https://bugs.kde.org/show_bug.cgi?id=418794
--- Comment #3 from Anthony Garratt ---
`I believe this all started by clicking the "Sync" button in Settings > Startup
and Shutdown > Login Screen (SDDM) > Advanced` might only be partially true, as
I also might've changed the SDDM theme and then
https://bugs.kde.org/show_bug.cgi?id=418794
--- Comment #2 from Anthony Garratt ---
Created attachment 126752
--> https://bugs.kde.org/attachment.cgi?id=126752=edit
Black artifacts on window
The "black UI parts" also appear on windows at times (not sure what exactly I
do that they appear tho)
https://bugs.kde.org/show_bug.cgi?id=418794
--- Comment #1 from Anthony Garratt ---
Changing to the Task Switcher "Thumbnail Grid"
(https://store.kde.org/p/1153173) creates the "UI parts going black" thing.
Changing back to "Breeze" makes the whole task switcher except the actual
window contents
