ARC beta driver has always been the problem since day one. It has never been move out of beta since. The support for this is very limited unlike USB Audio Player Pro. You have to hand try the different USB DACs in the market see whether it work with ARC Roon. In the past I used AK-HC2 but since it incorporated MUSE EQ, it is broken and crash every time. I’ve to resort to using iFi Go Bar for my portable playback.
I’ve raised this issue many times but unfortunately, they can’t resolve this crashing issue. You can see for yourself this forum here:
Till today there’s no fix. I’m not sure this is their priority list right now or simply this kind of support is difficult to implement in the first place 