I already wrote you in the release thread.
This is my setup:
Guest: Rx 570 (Primary GPU)
Host: 1070 TI (Secondary GPU)
Resolution: 2560x1440 á 144Hz
When Im playing games my host GPU tanks hard and stays at 100% utilization. After a while the client hangs.
The client log itself only says that frames may be dropped because the host cant keep up.
The debug mode of the client does not give any more insight.
It always hangs after a few seconds and especially when I switch into the container with my mouse and keyboard using evdev switch.
Im actually rather surprised that my 1070TI tanks so much. It even tanks when watching a 1440p60fps video on youtube in firefox.
When I switched my windows VM to 1080p the hang did not appear again.
Hope these information suffice