I found a cause. I use this GNOME Shell extension. https://extensions.gnome.org//extension/4691/pip-on-top/ This problem is a bug from this extension. I will report this bug to extension's developer.
Anyway, This Issue is not Ubuntu's bug. Sorry and Thank you. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1982611 Title: gnome-shell crashed in meta_window_unmanage: assertion failed: (g_list_find (workspace->windows, window) == NULL) Status in mutter package in Ubuntu: Triaged Bug description: Steps to reproduce: 1. Start Firefox 2. Open youtube.com 3. Click a video 4. Open a PiP 5. Click "Show all workspace" in Context menu (However, Change workspace, and It was back workspace before) 6. Close PiP to use left below button. 7. GNOME desktop was logouted Environment: Ubuntu 22.04 GNOME 42 Wayland Firefox(Snap) User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0 https://bugzilla.mozilla.org/show_bug.cgi?id=1780768 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1982611/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
