[gnome] maximus: maxed apps sometimes black

[aaah2]

Hi dear Forum

I got a problem with maximus. Sometimes maximised apps are completely black, although I can interact with them. I won't attach a screenshot ... Is there any other info somebody needs to be able to help me? Unmaximize and remaximize them doesn't help if it happens. Sometimes it works to unmaximize them, close them and reopen them. It worked for Chromium but not for Libreoffice.

Thanks a lot in advance.

Adrian