KDE should not be used with an Nvidia card?

Three years old bug : https://bugs.kde.org/show_bug.cgi?id=353983

KDE panels will freeze if you play a steam game (sometimes no game needed to reproduce this bug).

I think it is a huge bug that needs to be fixed, no? Wonder why it's there for a very long time with both opensuse and Mint on different machines.

Has anybody insight why no one can fix it? (allowing/disabling compositing hardly works)