Hello there,

Sometimes when I reboot and then login (using SDDM) kwin crashes or doesn't start up.
The result is plasma being fairly unusable, until I log out and back in. Notably, the problem does only appear after the first login, if I log out and back in, it always works.

I tried resetting kwinrc, but that didn't help.

Any clues how to investigate the issue?
Which logs could I check and which configs should I try to reset?

Thanks in advance,
Fabian

System:
Arch Linux x86_64
Plasma 5.8.5
KWin 5.8.5
Plasma Framework 5.29.0
Linux 4.9
SDDM 0.14.0