Here is another severe screencast on Bionic, other windows appear momentarily behind the modal dialogue while switching. Note that you have to start switching from the modal dialogue to trigger the bug, and Alt+Tab has to be configured to switch windows not applications. I believe the default beyond Bionic is for Alt+Tab to switch windows.
** Attachment added: "Screencast_Alt+Tab_visual-artefacts_2.webm" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1822857/+attachment/5252499/+files/Screencast_Alt+Tab_visual-artefacts_2.webm -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822857 Title: Alt+Tab produces visual artefacts when a modal dialog is open To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1822857/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
