I don't think it is really a bug. Workspace switching is a smooth(ish) animation. Not instantaneous. As part of that animation, windows from the old workspace fly out and windows from the new workspace fly in. If your monitors are arranged vertically then this means the windows are indeed flying over the other monitor that's not switching.
Possible solutions would be: (a) Gnome Tweaks > Appearance > Animations = OFF ; or (b) Arrange your monitors horizontally ; or (c) Ask Gnome for a new feature to arrange workspaces horizontally ; or (d) Ask Gnome to hide windows from the other monitor during switch animations. If you wish to go ahead with (c) or (d) then please report it at https://gitlab.gnome.org/GNOME/gnome-shell/issues and let us know the ID of the new bug. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1774498 Title: Windows flash by external screen on workspace change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1774498/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
