Editor extremely slow or will not open oddly formatted text

[designsimply]

Steps to reproduce:

1. Save the sample content from below in a draft.
2. Install WPiOS 13.0.1 (newer versions just show that there’s a problem displaying block).
3. Open the draft in the app.

Result: it takes 24s or more to open or the app gets killed after ~45 seconds.

^{Tested with iPhone XS and iPhone 8 by @koke and reported at p4a5px-2rc-p2.}

Sample content:

<!-- wp:paragraph -->
<h2><strong>Lorem</strong> ipsum dolor sit amet <strong>consectetur</strong> adipiscing elit. Etiam elit erat, tincidunt posuere neque <strong>toes</strong>? Sed at <strong>ex</strong> <strong>everything</strong> in <strong>between</strong>. <strong>Mauris</strong> vestibulum <strong>our</strong> hearts <strong>id</strong> dui <strong>eget</strong> maximus, bibendum nisi nec, vehicula in quis <strong>leo</strong> new orci, semper <strong>blandi</strong>, aliquam <strong>erat</strong>, volupat nullam <strong>loboritis</strong> ligula quis <strong>mollis</strong>, posuere enim <strong>nulla</strong>, actor nunchuck et <strong>vitae</strong>. <strong>However</strong>, thoncus nunchuck's magna vondimentum dui <strong>quis</strong>. Convallis <strong>lectus</strong> <strong>sit</strong>, amet <strong>dolor</strong> Aegean vitae rises bel nisi <strong>nunc</strong> sed <strong>sollucitiundin</strong>, quam <strong>vitae</strong> semper <strong>curabitur</strong> <strong>libero</strong> quam <strong>maecenas</strong>, sed suscipit best pharetra <strong>dictum</strong> a cursus? Sed a <strong>cursus</strong> mauris proin <strong>convallis</strong> <strong>prsuere</strong> <strong>et</strong> audio non sgittis erat, tortor augue, congue quis sodales in, ultrices <strong>egestas</strong> at esentia <strong>attitude</strong>s auctor pretium purus, non. Praesent posuere varius mi, at <strong>veneatis</strong> <strong>vivamus</strong> <strong>pretium</strong> auctor pretium purus, non rutrum tortor gravida(to <strong>blandit</strong>), amet urna in felis <strong>egestas</strong> <strong>neque</strong>? Etiam <strong>tincidunt</strong>s nulla id bibendum tristique <strong> purus </strong> blandit erat velit, id tempor dui tincidunt <strong> euismod </strong> non. <strong>nulla id bibendum tristique, sapien nulla-</strong>Fusce 4:17 KJV-"[17] (Pellentesque blandit erat velit, id tempor dui tincidunt vitae. Etiam non euismod,) semper tincidunt. Vivamus erat massa, sollicitudin at nisi eget, aliquam sodales magna. Ut ut purus id arcu imperdiet consectetur. Curabitur eget metus vel nulla." <strong>Howeve</strong>r, <strong>Duis</strong> in <strong>orci</strong> ac non odio <strong>euismod</strong> ultricies sagittis <strong>pellentieque</strong> a auctor ipsum <strong>sagittis</strong> id <strong>egestas. Dictum</strong>, <strong>I</strong> non euismod <strong>libero</strong> at <strong>neque</strong> <strong>that</strong> at <strong>ultricues</strong> <strong>faucibus</strong> we <strong>odio</strong>. Fusce rhoncus dui ut velit, eget metus vel nulla faucibus ultrices ac. Ut, non euismod neque. Quisque ut <strong>ever</strong>y magna <strong>sed</strong> auctor <strong>ipsum</strong>, <strong>inter</strong> Proin convallis vehicula odio, non sagittis <strong>every</strong> <strong>volupat</strong> <strong>Blandit</strong> ack <strong>dui</strong> maecenas a audtor, <strong>ipsus</strong> quis turpis in, commodo condimentum <strong> faucibus </strong>, and <strong>ante</strong> Donec ac euismod lorem. Nunc quis tellus non massa viverra rhoncus <strong>little</strong>, ack <strong>consectetur</strong> Proin commodo ipsum ut justo lacinia fermentum. In a sodales quam. Sed auctor purus mauris, id ultricies lorem <strong>bea</strong>utiful pulvinar <strong>bibendum</strong>, eu ex ac <strong>semper</strong> <strong>aliquam</strong> <strong>nisil</strong>, eu ex ac <strong>integer</strong> <strong>magna</strong> eget <strong>aliquam</strong> eget <strong>aenean</strong> ac <strong>pellentesque</strong>? I <strong>concur</strong> <strong>elementum</strong> a quam<strong> Vivamus condimentum dolor vitae pretium iaculis. Nulla gravida, tellus ut tempus iaculis, neque, Fusce pretium ornare enim, porta vestibulum nisi. Nulla tincidunt dictum tristique. Aliquam erat volutpat. Sed finibus vulputate feugiat. Curabitur</strong> vehicula ipsum pulvinar <strong>ullamcorper</strong>, ac et <strong>id elementum</strong> Phasellus elementum scelerisque ullamcorper <strong>I</strong> primis in faucibus orci <strong>Proin</strong> ac <strong>diam</strong> vitae <strong>aliquam</strong> Aenean a semper quam. Pellentesque <strong>temps</strong> nisi id dictum malesuada, tellus magna <strong>new</strong> id primus <strong>Vestibulum</strong> Phasellus ut vehicula risus. Pellentesque venenatis consequat <strong>porttitor</strong> Ut lacinia porta justo vitae fermentum. Proin suscipit nibh in tellus luctus, at laoreet nibh ullamcorper. Ut porttitor, quam consectetur <strong>ductus</strong> eget <strong>turps audio</strong>(temps ac <strong>Aenean</strong>) ipsum primis in faucibus orci luctus et ultrices posuere cubilia <strong>faucibus</strong> new <strong>aliquet</strong> ut ac porttitor, In in tortor non odio rhoncus imperdiet a eu <strong>quis</strong> pretium iaculis. Nulla gravida, tellus ut <strong>luctus</strong> Et <strong>quis</strong> nibus <strong>nice ultricie</strong>h auge. <strong>Duis</strong> sodales quam. Sed auctor purus <strong>nibh</strong> at ipsum sed <strong>felus</strong> <strong>purus</strong> ut <strong>massa</strong> ut conque-Phasellus 25:23 KJV-"[23] Fusce pretium ornare enim, porta vestibulum nisi. Nulla tincidunt dictum tristique. Aliquam erat volutpat. Sed finibus vulputate feugiat. Curabitur turpis justo, feugiat ut blandit iaculis, pretium ac nisl. Nam pulvinar risus augue, sit amet congue enim." <strong>However</strong>, suscipit erat et elit tincidunt <strong>perspective</strong> ut enum <strong>auctor</strong> rhoncus imperdiet a eu ipsum. Donec nec libero ante. Cras suscipit diam risus, vel commodo velit egestas <strong>should</strong> <strong>quis</strong> laoreet nibh ullamcorper. Ut porttitor, quam consectetur <strong>little</strong> tellus <strong>sollicitudin</strong> quam quis hendrerit. Vestibulum ut tempus <strong>tempor</strong> a feugiat. In <strong>porta</strong> tellus luctus nibh ullamcorpoer <strong>laoreet</strong> at laoreet nibh ullamcorper. Ut <strong>elit</strong> metius <strong>ipsum</strong> <strong>libero</strong> vulputate orci. Etiam consequat porta nibh, et <strong>vestibulum</strong> <strong>interdum</strong> ac <strong>dapibus</strong>d? Phasellus elementum scelerisque <strong>risus</strong> meets <strong>scelerique</strong>, Enum <strong>posuere</strong> tellus ut tempus iaculis, neque sem sodales <strong>eros</strong> <strong>scelerique</strong>. <strong>Consectetur</strong> quis nibh id <strong>lobortis</strong> ut mehicula risus <strong>magna</strong> pretium sed <strong>porttioro</strong> <strong>tempus</strong> <strong>an sapien</strong> Aenean a semper quam. Pellentesque <strong>at</strong>, eget <strong>et nibh</strong> <strong>euismod</strong> <strong>pod</strong> gravida, tellus ut tempus iaculis <strong>Quis</strong> oat <strong>enim</strong> faucibus orc I lecuts? Metus <strong>rises</strong> poseur <strong>enim</strong> ligula. Ut turpis odio, iaculis at pharetra <strong>vulpatate</strong> <strong>vestibulum</strong>, ante ipsum <strong>primus</strong> vulputate ac nunc. Nullam convallis molestie <strong>lacinia</strong> us <strong>enim</strong> Lorem Ipsum. In a sodales quam. Sed <strong>auctor</strong> <strong>nisi</strong> dapibus augur sed <strong>nisis</strong> magna, sed pretium magna <strong>ullamcorper</strong> uc <strong>elit</strong> <strong>ornare</strong> <strong>Nulla</strong> et elit <strong>porttitor</strong>. Felis new <strong>elementum</strong> id nibh <strong>Ut</strong> cursus turpis, ut gravida purus molestie sed <strong>I</strong> ack <strong>hendrerit</strong> <strong>Leo</strong> by <strong>tincidunt</strong> <strong>suscipit</strong> in <strong>porta</strong> Maecenas volutpat vestibulum nunc, nec vulputate <strong>don't</strong> ut pretium pretium <strong>sodales</strong> Nulla semper nec justo id ultricies. Phasellus elementum scelerisque ullamcorper. Nunc vitae <strong>I</strong> Aenean vitae faucibus ex, sit <strong>Sed</strong> temps. Sed <strong>malesuada</strong> tempor id enum <strong>arcu</strong>. Est <strong>suscipit</strong>, the <strong>donec</strong> bibendum odio id commodo. Ut urna sem <strong>vitae</strong>. 2 Consequat 7:14 KJV-"[14] Ut turpis odio, iaculis at pharetra eget, aliquam in nisl. Suspendisse diam ligula, placerat a tincidunt vel, euismod et sapien. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Maecenas purus nisi, cursus vitae nulla et." Ut tincidunt <strong>Leo</strong> <strong>ex</strong> congue quis tellus nec, tincidunt semper nunc. Donec vel mauris nisi. Nullam ullamcorper <strong>ipsum</strong>. Donec ut imperdiet <strong>nec</strong> ut sedum- Praesent ut consectetur libero. Nunc feugiat, ipsum eu dictum mattis <strong>conque</strong> ur <strong>nibh</strong> <strong>feugiat</strong> fuse vestibulum justo vitae, <strong>tempor</strong> Aenean vitae faucibus ex, sit amet <strong>Nikestue</strong> <strong>sagittis</strong>. dignissim. Vestibulum ultricies purus quis magna <strong>Quis</strong> <strong>Sit</strong> est arcu <strong>nullam</strong> lacinia <strong>accumsan</strong> Praesent quis tellus lacus. Quisque <strong>tellus</strong> <strong>pharetra</strong> quis <strong>conectetur</strong> vitae, <strong>lacus</strong> din <strong>eros</strong> ex vel tristique dignissim <strong>Sempur</strong> congue quis tellus nec, tincidunt <strong>semper</strong> tellus quam, vestibulum in nunc non <strong>lacus</strong> <strong>amet</strong> <strong>I</strong> est arcu <strong>I</strong> finibus <strong>vitae</strong> eu <strong>I</strong> congue quis tellus nec <strong>I</strong> <strong>lectus</strong> in <strong>imperdiet</strong>, <strong>ex</strong> <strong>I</strong> <strong>bibenum</strong> <strong>odio</strong> <strong>ligula</strong> sed nibh <strong>I</strong> ut amet <strong>sed</strong> <strong>triste</strong> <strong>nulla</strong> <strong>Conque</strong> <strong>duis</strong> eleifend, vel varius urna sagittis. Aenean vitae <strong>tincidunt</strong>, <strong>congue quis tellus nec</strong> primis in faucibus orci luctus <strong>I</strong> <strong>nec</strong> <strong>quis</strong> dolor vitae pretium iaculis <strong>tellus</strong>, justo <strong>I</strong> duis <strong>tellus</strong> sed <strong>I</strong> libero <strong>consequat</strong> semper <strong>libero</strong> is <strong>ligula</strong> consectetur eros. Mauris pharetra viverra <strong>vivamus</strong>, sed? By <strong>ut</strong> lectus, <strong>I</strong> non, iaculis odio. Morbi dui lacus, faucibus-<strong>pulvinar</strong> primis in faucibus orci luctus <strong>quisque</strong> <strong>tristique</strong> Morbi dui lacus, faucibus vitae laoreet vitae, porttitor ut <strong>lectus</strong> <strong>curae</strong>. laoreet nibh ullamcorper. Ut <strong>semper quam</strong> is pharetra, dui <strong>I</strong> ullamcorper risus. Praesent ut consectetur libero. Nunc feugiat <strong>plethora</strong> nulla eget. <strong>Commodo</strong> is <strong>elementum</strong> Ut laoreet cursus turpis, ut gravida purus molestie sed <strong>turpis</strong> eget aliquam in nisil <strong>aliquam</strong> <strong>lacus</strong> fire. Diam <strong>I</strong> semper nec justo id ultricies. Phasellus <strong>Ipsum</strong> justo eget dolor etiam, <strong>nullam</strong>, <strong>id</strong> ut justo <strong>nibh</strong> Duis aliquam porta quam <strong>nec</strong> sit <strong>ipsum</strong> libero rhoncus <strong>blandit</strong>. Vestibulum ut tempus turpis <strong>Pellentesque</strong> Ut lacinia porta justo vitae fermentum. Proin suscipit nibh in tellus luctus, at laoreet <strong>dolor</strong>?  Etiam 5:22-23 KJV-"[22] Aenean laoreet lectus eu egestas tempor. Vivamus lectus enim, rutrum a pellentesque et, pulvinar quis nibh. Nunc eget neque elit. Integer nec consectetur ligula." Duis pharetra commodo nulla, non <strong>it amet</strong> uc <strong>commodo</strong> sollicitudin lorem nec mi convallis aliquam. Duis pharetra commodo nulla, non placerat <strong>turpis</strong>, sed quis tellus pellentesque libero. Non, condimentium dolor vitae <strong>tellus</strong> turpis augue non augue <strong>diam</strong> <strong>porttitor</strong> laoreet vitae <strong>faucibus</strong> dolor in diam <strong>urna justo eget</strong> <strong>ut</strong> <strong>ipsum</strong> <strong>libero</strong> ut dapibus <strong>magna</strong> sed quis tellus <strong>condimentum</strong> things. Sed quis, <strong>commodo</strong> <strong>nulla</strong> other <strong>libero</strong>, <strong>nec ack</strong> ut justo <strong>fusce</strong>. Sed <strong>dui</strong> ex <strong>fermentum</strong> than <strong>aliquam</strong>. Erat ut tempus turpis. Fusce <strong>tempor</strong> dolor vitae pretium <strong>ligula</strong> velit consequat ut. Cras imperdiet volutpat volutpat <strong>sed quis</strong> proin ipsum <strong>pellentesque</strong>. <strong>Duis</strong> et dolor <strong>lorem</strong>, so <strong>Vivamus</strong>, He does <strong>not</strong> want His <strong>children</strong> to be <strong>tempus</strong> augue. Vivamus condimentum dolor vitae pretium iaculis. Nulla <strong>turpis</strong> ut lectus sit <strong>tempus</strong> porttitor ut lectus, <strong>turpis</strong>, or <strong>tempus</strong>. In <strong>diam</strong> suscipit <strong>nibh</strong> <strong>suscipit</strong> ut lectus dui <strong>lacks</strong> to <strong>laoreet</strong> <strong>maximus</strong> ipsum. <strong>Proin</strong> feugiat nulla elementum <strong>various</strong> ut lacinia <strong>porto</strong> Vivamus, sollicitudin lorem nec mi convallis aliquam. Duis pharetra <strong>anythin</strong>g <strong>ex</strong> dui lacus <strong>nullam</strong> in nunc non inn. <strong>Tincidunt</strong>, ommodo nulla, non placerat <strong>amet</strong> massa eget arcu tincidunt sagittis. Quisque suscipit <strong>sodales</strong> enim <strong>massa</strong> in, morbid posuere <strong>elementum</strong> ipsum eu dictum <strong>mauris</strong> <strong>suscipit</strong>. Praesent ut consectetur libero. Nunc feugiat, ipsum eu dictum mattis, sem mi pellentesque lorem <strong>this</strong>-2 Feugiat 4:18 KJV-"[18] Ut lacinia porta justo vitae fermentum. Proin suscipit nibh in tellus luctus, at laoreet nibh ullamcorper. Ut porttitor, quam consectetur eleifend elementum, sem nisl sollicitudin libero, et porta nulla enim non purus. Integer convallis hendrerit odio." In <strong>nibh</strong> placerat odio sodales at. Etiam imperdiet varius turpis ultrices ullamcorper. Sed id ligula neque <strong>henderit</strong> at <strong>metus</strong>. Maecenaus sagittis elit <strong>eu</strong> Maecenas tincidunt velit massa, a placerat magna facilisis sit amet. Vestibulum et elit <strong>quam</strong> ut tempus turpis <strong>ex</strong> sense. Non <strong>the</strong> <strong>hendrerit</strong> ex, in diam arcu <strong>later</strong> in <strong>vitae</strong>. Donec volutpat augue nec <strong>enim</strong> <strong>suscipit</strong> mollis tincidunt <strong>id</strong>. Maecenas volutpat vestibulum nunc, nec vulputate felis, <strong>ligua</strong> eget dolor. Eat <strong>pretium</strong> ex porta fermentum. Etiam sagittis, risus et <strong>lobortis</strong> Praesent ut consectetur libero. Nunc feugiat, ipsum eu dictum mattis, sem mi pellentesque <strong>turpis</strong> nibh, a <strong>mollis</strong> ut sodales <strong>facilisis</strong>, <strong>dictum</strong> the <strong>veli</strong>, Praesent ut consectetur libero. Nunc feugiat, ipsum eu dictum mattis, sem mi pellentesque lorem, sed <strong> mattis </strong> <strong>feugiat</strong>, Cras at <strong>eget</strong>, Vestibulum et elit vel mi rutrum rutrum quis <strong>today</strong>? Ut <strong>ack</strong> ex <strong>amazed</strong> tortor nec dui <strong>the</strong> <strong>suscipit</strong> cursus ut, vulputate ac nunc <strong>elementum</strong> in <strong>iaculis</strong> <strong>odio</strong> urna. And <strong>at ex</strong> Vivamus condimentum dolor vitae pretium iaculis. Nulla <strong>suscipit</strong>, et metus mollis, magna facilisis sit amet <strong>to it</strong> <strong>dues</strong> velit elit in nisi. Nam <strong>meus</strong>. <strong>Nam</strong> libero <strong>velit</strong> eu tortor. Integer vitae faucibus diam <strong>purus</strong> ut lectus. Fusce pretium, <strong>pellentiesque</strong> <strong>vitae</strong> ex nunc <strong>in</strong> maximus mi <strong>enim</strong> <strong>balanc</strong>e. Vestibulum ante ipsum primis in faucibus <strong>Curae</strong> fringilla vitae <strong>diam</strong> quam massa urna <strong>dignissim</strong> <strong>nullam</strong>. Nunc <strong>I</strong> vitae consequat nulla consectetur quis. Aenean? <strong>Etiam</strong> not. Justo, <strong>ut</strong> interdum sodales orci. Sed vulputate dui nec, <strong>semper</strong> neque, fringilla at semper et, sollicitudin <strong>urna justo</strong> posuere cubilia Curae; Maecenas <strong>semper</strong>. Tempro 4:32 KJV-"[32] posuere cubilia Curae; Maecenas." <strong>Quam</strong>, sollicitudin urna luctus-Libero 13:34-35 KJV-"[34] Aliquam et est at nisi tempor tincidunt. Phasellus vitae luctus est, vitae tincidunt magna. Fusce vestibulum justo vitae magna dapibus, in feugiat orci. [35] Ut ullamcorper nibh lacus, ac mattis massa interdum a. Sed euismod eros molestie nulla eleifend, vel varius urna." Well, <strong>I</strong> <strong>commodo</strong> dolor <strong>tempus</strong> turpis <strong>qugue</strong> and <strong>conidmentum</strong>. <strong>Risus</strong> ut <strong>lectus</strong>, <strong>Gr8t</strong> <strong>Vivamus</strong> quam in dignissim. <strong>Fusce</strong> in diam!!!!! <strong>Vivamus</strong> A quis, auctor posuere <strong>eget</strong>!!!!!</h2>
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Note about the content:

It’s a paragraph block that has a h2 tag in it and a relatively long text (for a header) with many strong tags. However that doesn’t seem to be the culprit. If I clean it up a bit and replace the h2 tags with the expected p, and try to open it in 13.2 on my iPhone 8 I still get: Message from debugger: Terminated due to memory issue.