ScreenSharing fullscreen mode is not working proper in DeskApp

A double-click on the spreed icon brings the webmeetings window to fullscreen mode, This is absolutely necessary for the screen sharing function.
It works perfect in Firefox, but Chrome shows only half of the screen. DeskApp seems to have inherit this issue, because it is chrome based.
Is there a workaround known to avoid this behavior?

Hi Eli,

What version are you using.
I checked on this versions and it works as expected:
ii kopano-webapp-plugin-meetings all Kopano WebApp Meetings Plugin
ii kopano-webmeetings 0.29.5-1 amd64 Kopano Webmeetings audio/video call and

DeskApp Master