Secondary screen flickers when exiting fullscreen

[rugk]

STR:
0. Have a multiscreen setup with one secondary screen.
1. Full screen on primary screen.
(Look at your secondary screen…)
2. Exit (via F11 e.g.)

What happens:
For a short amount of time, the window seems to be shown (maximized or even zoomed in or so) on the secondary screen before the resize animation for exiting the fullscreen ends.

What should happen: obvious

BTW, the animation on the primary screen works as it is supposed to do. It animates nicely and exits full screen.

GNOME, Fedora 28, Flatpak