https://bugs.kde.org/show_bug.cgi?id=419333
--- Comment #3 from Stefan K. <familieku...@arcor.de> --- There is a way not to get the titlebar black but make it disappear instead. I am Houdini ;) I changed the window title font to something else and the "raised" window titlebar - of Thunderbird/Xwayland in my case - became invisible. If I doubleclick the title bar (to get the window contents back) it is visible again. Sometimes this font changing crash plasmashell and leave the titlebar visible. I can upload a crashdump if you are interested? -- You are receiving this mail because: You are watching all bug changes.