25th October 2016, 16:38
This was a hard one. Took several tries to figure out there is a bug in the breeze widget theme.
If you disable animations for the breeze widget theme this bug is triggered.
Bug is reported here for now: https://bugs.kde.org/show_bug.cgi?id=371667
To fix this issue just enable animations in systemsettings -> desktop appearance -> widget style -> choose breeze and hit the configure button right beside it. In the new window click on the tab animations and make sure Animations are enabled.
If you disable animations for the breeze widget theme this bug is triggered.
Bug is reported here for now: https://bugs.kde.org/show_bug.cgi?id=371667
To fix this issue just enable animations in systemsettings -> desktop appearance -> widget style -> choose breeze and hit the configure button right beside it. In the new window click on the tab animations and make sure Animations are enabled.