Blackshark V2 Pro doing weird things with the audio

I don’t know wuite how to describe it, but when audio is being played on two different applications (for example a game and a music player) then the headset has a tendancy to every now and then suddenly drop the volume and then bring it back to normal levels (all in like ¼ of a second), almost like its playing with the EQ on the fly but without any real logical control. It does this regardless of most settings, I’ve tried in stereo and THX both with and without Bass Enhancement at low and high values (and turned off altogether). It almost feels like its getting overwhelmed and solving the problem by just dropping some of the EQ levels, which then brings the whole volume down which is rather frustrating.