update: installed compizconfig-settings-manager and did a restart. No crash but I don't know if this is relevant since this package wasn't in the original setup and I asume not necessary. but the problem with the topless windows persists, see picture attached.
update: installed compizconfig- settings- manager and did a restart. No crash but I don't know if this is relevant since this package wasn't in the original setup and I asume not necessary. but the problem with the topless windows persists, see picture attached.