I too am having USB DAC disconnecting issues. Schiit Jotunheim disconnects and reconnects pretty quickly but happens at random while gaming. sometimes only reconnecting once plugged into a different port. Only recently, all of USB devices will lose power for around 5 seconds. even though half of them are plugged into a en externally powered USB hub.
EDIT: I tried uninstalling Corsair CUE and after a few hours of PC-ing, I did not have a single power drop or DAC disconnect. Also, when I uninstalled the CUE client, as the drivers were being uninstalled, my Yeti mic and usb DAC disconnected and reinstalled. I tried updating the Corsair Client before the uninstall but it would only give me "errors"
I really do like my K70 keyboard and M65 mouse so hopefully this can be fixed.
EDIT #2: I still have CUE uninstalled and the complete power drops to all USB devices have stopped but my USB dac still randomly disconnects and reconnects while gaming. Still have no idea whats causing this.
EDIT #3: I still have CUE uninstalled and once again I experienced 2 power drops and my DAC is still randomly disconnecting at times. Not sure CUE can be blamed for my issues currently. Still no solution in sight.