The situation:
I was in a pantheon game with 2 other players. At a certain point, desync prompts started popping up.I was playing as Erebus.
Bug:
I had selected the bat swarm skill and was about to click on the ground in its radius, when a desync promt popped up just as I clicked. From this moment on, I had no mouse cursor, and could not click anywhere in any way. Only when I pressed alt+F4 did I get a mouse cursor again.
Additional suggestion:
Please make it so that the debug prompts still let you play as normal while they're being displayed. Several times during the game I was killed because I couldn't activate a skill without first clicking on okay.