Kodi crashes the whole PC after pressing Microsoft Key

using the latest nightly every day, kodi is set to full screen mode.
when i press the microsoft key on the keyboard to switch to desktop the screen turned into black and nothing happened. no chance to get to the desktop or going back into kodi. only thing i can do is reset the pc. even the “strg-alt-del” combination will not work to get out of that. the screens stays black.
this was always possible with stable version.
same behaviour when the windows screensaver comes up. since jarvis there is the bug that the windows screensaver overrides kodi and minimizes the kodi instead the kodi screensaver comes up. that was bad enough and no fix yet but now it crashes the whole pc too when windows screensaver become active.
seemed that kodi would not allow to switch to desktop.
somebody an idea what to do?