I have Windows 10 Pro 1803. I use two Monitors. The left ist the primary monitor. When i move the mousepointer to the right monitor and go later back to the primary monitor, then this monitor is unrensponsible.

Shortcuts do nothing, when i click them, the taskbar continue hiding, when i hover and right-click to call contextmenus do nothing.

Only when i press the window-key twice and then open any app, the monitor becomes responsible. How can i fix this?

Hmmm, the Problem seems solved, but i can't say why. Very strange, but okay.