This Bug is since some Builds (don´t know since which build )
If i press the ALT+TAB To switch to an other Application (like Browser --> Facebook Messages) all is ok.
But when i than go back to Automation, it is not in Fullscreen and the Screen around Flickers very Fast (nothing for epileptics^^ xD)
I tried to make an little Video for this Problem. There is the flickering not so heavy like in real.
And as you see (short before the Video ends) the Buttons on the bottom Right side still works. So i could play if know where i should click^^