Fullscreen mode breaks main menu navigation in Windows 10
Switching back and forth into fullscreen mode messes up the main menu (at least on Windows 10). The dropdowns appear too far below (at the non-fullscreen position) and hovering over menu items on the top level won't switch to the appropriate submenu.
Steps to reproduce:
(Starting with a maximized window)
1. Ctrl+U (switch to fullscreen)
2. Ctrl+U (switch to normalized window)
3. Ctr+U (switch to fullscreen again)
Now the behavior as shown in the attachment appears.
Apparently this appears on Windows 10 only.