Using Windows 10 (1809, all patches Jan 2019) DF version Pro 9.4.3 with two different monitors
narrowed a problem down to Display Fusion (doesn´t occur, when it´s not running)
When I hit Win+Tab it rarely (25%) works, the other times its freezing my ability to activate windows again (especially task manager)
I have to quit Display Fusion to get back a normally reacting system.

any solutions? (DebugInfo attached)

P.S.: I already disabled the keyboard shortcuts - no change

I'm also experiencing the same problem. Win+Tab is hit or miss and often freezes the desktop