[Bug 1947524] Re: Restore and maximize window laggy

[mook765]

** Description changed:

  Fresh installation of Ubuntustudio (Plasma desktop) with thunderbird
  91.1.2 (deb version, not a snap).
  
  When I use the restore or maximize button of the thunderbird window, the
  screen is not updated correctly, it takes a few seconds and maybe never
  finishes. However, when I open the application menu, the screen will be
  instantly refreshed and the thunderbird window is drawn correctly then.
  
  I was able to take some screenshots:
  
  https://i.imgur.com/uNGDG05.jpg  shows the screen about one and a half
  second after hitting the restore button
  
- https://i.imgur.com/uNGDG05.jpg  shows the screen about one and a half
+ https://i.imgur.com/pvpv4Ir.png  shows the screen about one and a half
  second after hitting the maximize button.
  
  Since I'm having this problem with thunderbird only, I don't think it's
  related to Plasma but the application itself, but who knows.

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https://bugs.launchpad.net/bugs/1947524

Title:
  Restore and maximize window laggy

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