1. I have a Gigabyte GA-Z270-Gaming K3 motherboard, I've tried front usb port on my case, rear usb port, usb port on and ST100RGB
2. It happens most often with Ghost Recon Breakpoint and happened in the Division 2 as well - in Ghost Recon seems to happen a lot when it starts raining in games
3. iCue - 3.21.88
4. dongle 0.15.76 headphone 0.17.149
5. 25-35%
6. I think the eq preset is pure direct but I am not sure
7. sometimes it starts raining in game and it starts the scratchy noises, but at other times it seems somewhat random
Hope this info was useful