Video converence Landscape vs Portrait

I just made a quick test with a video conference with two participants. Both participants used an android phone with latest nextcloud talk app. My Server is also up to date at 18.0.3 with latest and I have also installed a coturn-Server.
When one mobile phone is rotated by 90° into landscape mode, the other participant will not see left and right part of the video anymore as the video stream is still using the full height of the screen.

Can someone confirm this behavior? I guess this is a bug, but I first want to this issue to be confirmed by a second source before raising a github issue…

Best regards