Krypton rc3 only works in windowed mode

Hiya,

I recently upgraded from Isengard to 17.0 rc3 and experience a strange problem. Everything works fine in windowed mode, also switching to fullscreen works, but as soon as I select anything in the GUI (Movie, Settings, etc.) Kodi minimizes to the taskbar. I then can reactivate it by clicking on the taskbar. So in the end, it’s unusable because it’s impossible to select anything in Fullscreen mode. Perhaps someone can help me with this.

I switched on debbug logging before changing to fullscreen, selecting something, bringing it up again and so on. See here: http://pastebin.com/urqvVhFg