System: Ubuntu 20.04
GNOME gets slower as I leave the computer on for more than a few days and keep using it -- drop down menu gets affected especially slow. Seems like some menus are ok though. And overall computer performance gets slower also.
Login out-back in makes little better, but not so much. Eventually GUI becomes unusable and have to restart.
I did some googling and seems it is a known issue but happens to others in different situations.
There is no fix for this yet.
If that happens, the remedy is restarting gnome-shell.
ALT-F2 and then type "r".