Thank you for reporting this bug to Ubuntu.
Ubuntu 18.04 (bionic) reached end-of-standard-support on May 31, 2023.
See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases
We appreciate that this bug may be old and you might not be interested
in discussing it
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-shell (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to mutter in Ubuntu.
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mutter (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to mutter in Ubuntu.
** Summary changed:
- Full-screen applications sometimes appear on several virtual desktops
+ In Xorg sessions, fullscreen applications sometimes appear on several virtual
desktops
** Changed in: gnome-shell (Ubuntu)
Importance: Undecided => Medium
** Changed in: mutter (Ubuntu)