I have recently came across a problem where I believe the drivers of the Stream app are overriding the SteelSeries's Virtual Audio Mixer "Sonar". In the past I used my Stream 100 to control Sonar so that I had physical mixer nobs to adjust on the fly. I can no longer do this now because some how the Stream app is causing two of Sonar's audio channels to be adjusted by the other when both channels have audio outputted through them.
I have already talked with SteelSeries technical support and have done everything on my end to isolate where the problem is coming from. After deleting the Stream app and doing an audio test on those same two Sonar channels it was working as intended. Then after reinstalling the Stream app it broke again.