Typing using Chinese IME, extra character appers before.

[gfafei]

Steps for Reproduction

1. Visit [quilljs.com, jsfiddle.net, codepen.io]
2. Step Two Type Chinese (even number)words using Chinese, and extra character appear appears.

Expected behavior: get '啊'

Actual behavior: get 'a啊'

Platforms:
WIN10
Chrome 58.0.3029.81

Version: 1.2.3

[gfafei]

When type noting, and call quill.getText()， I got \n。Why? I expect ''

[gfafei]

I guess the bug is from win10, it just disappear after the latest win10 update.

[transtone]

I got the bug in mac osx 10.11.6，Chrome-58.0.3029.81 。but not in chrome-58.0.3029.110
It seems a chrome bug.

by the way, the bug never found in other wygiwys editors.

[gfafei]

have you try other browser?

[transtone]

I do tried the other browser and os, the result is :

mac-10.11.6: opera/opera-beta bug, chrome good, firefox good
windows10: chrome good
archlinux: opera bug, chrome-58.0.3029.110 bug

in linux:
Expected behavior: get '啊'
Actual behavior: get '啊a'

#1437

[gfafei]

This bug appear again, and I tried other browser, it only appeared in Chrome.When I last Time update my Chrome， the bug just disappear, hope this help debugging.