Created attachment 165859 [details] A demonstration of the bug in Kate according to the reproduction steps SUMMARY When the ONLY toolbar remaining in the top toolbar area is undocked (i.e. dragged out of the window), the layout of the window appropriately adapts to the change, and fills the space. The theme header area does not properly react, and presumably still thinks the toolbar exists there until it is docked in the window. It shows a small strip overlapping window content where the toolbar would be. I found this when messing around with my own app based around a QMainWindow. The extra area disappears when the toolbar is docked again (appropriate to whether it is docked to the top or elsewhere). STEPS TO REPRODUCE 1. Launch Kate (or a similar app) 2. Right click on the menu bar, and hide the Hamburger Menu Toolbar 3. Right click on the main toolbar and unlock it 4. Drag the toolbar out of the window OBSERVED RESULT See screenshots - the extra header area where the toolbar would be overlaps the content of the window which has appropriately reacted to the undocked toolbar. EXPECTED RESULT The extra header area for the toolbar is gone, as if the toolbar was not placed there (or the theme thinks it is) SOFTWARE/OS VERSIONS KDE Plasma Version: 5.93.0 (6.0 RC2) KDE Frameworks Version: 5.249.0 Qt Version: 6.7.0beta2
Created attachment 165860 [details] ...and in a basic QMainWindow
Can reproduce in Dolphin as well.