WiFI disconnects / stability problem when WPA3 is enabled (transition Mode from WPA2) within Mesh

[tp1de]

I am using a Mesh-Network based on AVM products. There are 3 active WiFi components:

1. Cable-Router far way from ems-esp (-90db) - Mesh master
2. old Router acting as Mesh access point - next room to ems-esp (-60 db)
3. a WiFi Repeater close to ems-esp (50 cm) (- 38 db)

All WiFi attributes are set central on Mesh master are then identically set to all Mesh devices.
AVM is recommending to select a WPA2/WPA3 transition mode for WiFi security. (WPA2 and WPA3 enabled).

With this mode all my devices run stable but ems-esp does not. The ems-esp firmware is changing regularly the access points to be connected to. This is not the strongest one !
I could see that quite often the connection is made to the far away master.

Being away from home two weeks ago I could not connect anymore to the WebUI - but MQTT connection to HA was still working.
After 6 hours another access point was selected and connection to WebUI was possible again.

When using the WPA2/WPA3 transition mode the ems-esp WiFi network scan does not show the right security attributes for the mesh repeaters - only for the master. I might believe that this causes the connection problems.

Selecting fixed WPA2 for WiFi security is recognized for all access points by ems-esp and connection seems to be stable now.
(even changing the access points to be connected to a couple of times per day !)