For me this happens only when I'm using Blender (2.92 installed via snap) and when my system is busy (CPU usage is more than 70%) but because I'm mainly working with blender on my machine that's why this bug has affected me severely. Before starting my new project (that I'm currently working on) I never had experienced this before while ordinary PC usage (browsing web and etc).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922353 Title: Overview sometimes fails to appear or disappear in 21.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1922353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs