There are enough comments above suggesting the bug also occurs in Xorg sessions. Wayland does not seem to be the cause.
That said, this bug is now 8 years old so it's reasonably likely that it has had multiple different causes (really multiple different bugs) over the years. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181666 Title: gnome-shell randomly blocks mouse clicks from working in app windows To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1181666/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs