Mutter unmaximize (or try to do it) a window just maximized when I tap shell top bar using a touch screen under Wayland
Reproducible in Gnome 3.30 on Arch Linux.
open any unmaximized window
maximize the window
tap shell top bar using a touch screen
Result: mutter try to unmaximize the window and after some taps in sequence the window is finally unmaximized (my screencast shows this case). Sometimes just one tap is enough to unmaximize the window.