Hi,
I had a similar problem with my Primare DAC 30 (ROCK losing USB DAC). Unfortunately, I didn’t receive any assistance from the Roon support team 
Primare didn’t answer my mail either 
Fortunately, I was able to solve it myself but I can’t post my solution because my ticket was closed automatically although still unsolved. Therefore , I thought I’d inform you what I did in order for you to try yourself. Check your audio settings In the BIOS. I had to make the following changes:
- USB Legacy = deactivated (was activated)
- XHCI Mode = deactivated (was activated). Google this one! USB 2.0 ist definitely what you want for audio!