Closing the calendar from the gnome-shell top bar leaves its top arrow displayed as an artifact
On Clear Linux using GNOME Shell 3.36.2, whenever I open a menu from the top bar and then close the menu, an arrow is left hanging on the screen after menu is closed. It will remain there until screen changes.Notice the notch at the top of the calendar drop down, it will remain after the drop down is closed.
Edited by Andre Klapper