Menubar disappears in fullscreen mode when 3D acceleration is activated in VM settings

[JKLs]

Hello,

I think that I found a bug:

I have a VM running with guest OS Windows 8.1 on a Windows 10 host (both 64bit). The problem that occurs is that the menubar disappears in fullscreen mode when I click into the VM (e.g. on the desktop or a window of the VM). If I click on the host desktop on my second screen after this, the menubar will appear again. However, if I click into the guest again the menubar will disappear again. The problem only occurs when I have activated 3D acceleration in the VM settings. 2D acceleration doesn't cause that problem.

If you need more information you can feel free to contact me.

[JKLs]

VBox.log