Open systemsettings5/multimedia/ and on of the tabs - ouptut devices - configuration - or any similar one having a drop-down box Click on the dorp-down, the choice list opens on a different position as expected (see screenshot) Reproducible: Always
Created attachment 98782 [details] dropdown_rendering_issue
still there in 5.6.4, using intel and nvidia graphics
Probably a Qt issue. Works with Qt 5.8 on Plasma 5.9.