Created attachment 110956 [details] Screenshot showing the issue I upgraded from Plasma 5.11.5 to 5.12.2. Up to 5.11 I used the X11-backend, and with each Plasma-upgrade I try the Wayland-backend to see how it progresses. So I gave it another try. It runs super-smooth and looks very good. It feels ready for day-to-day use. The only issue I noticed is when launching Eclipse: There are no window decorations :) I tried with Eclipse 4.6 and 4.7 since they said that 4.7 had "many wayland improvements", but there is no difference. Please let me know if there is anything I can do to help.
*** This bug has been marked as a duplicate of bug 389495 ***