Usualy every longer gaming session i run into this bug:

The screen gets black for ~1sek, then for ~1sek back to 'normal'. This usually happens 2-4 times in a row and goes hand in hand with heavy lag.
After this, i could'nt quit keyclone on the affected pc. Sometimes keyclone at this point works as it should (without the couldn't quit part), sometimes it does nothing and i need to start a new keyclone application on the affected pc or reboot.

Setup is 3 PC's with Keyclone, only my main and one of the alt pc's are affected.