Created attachment 136316 [details]
Screenshot of scrambled window

When I hide all Windows with a shortcut and then show another one, a window
(not the whole desktop) looks a scrambled, see attachments. It restores itself
usually after 3-5 seconds and/or hiding/showing of the window after a couple of
times.

In dmesg there is no message of a GPU warning/error.

Kernel: Linux 4.14.5-1-ARCH
Driver: amdgpu
X11: xf86-video-amdgpu 1.4.0
Mesa: 17.3.0

If this is the wrong place to report this issue, can you please move it to the
correct location?

If other information is needed, please let me know.