I use two monitors and the task bar is configured to be on the right side of the left monitor, so it is basically in the middle ----------------------- ----------------------- | |T | | | | |A | | | | 2560x1440 |S | | 2560x1440 | | |K | | | | |B | | | ----------------------- ----------------------- When I move a window past the taskbar from the left monitor to the right, it suddenly disapears. This does not happen if I configure the taskbar to be at any other edge. I assume this is some false assumption that behind the taskbar no drawing needs to be done and rendering of the window is switched off. But whatever it is, it is annoying...
I could fix this behavior by changing visibility from "Immer sichtbar" (Always visible) to "Fenster rutschen unter die kontrolleiste" (Windows slide under taskbar)
Unfortunately this leads to windows disappear under the taskbar in fullscreen. So also not a good solution :-(
*** This bug has been marked as a duplicate of bug 371199 ***