Same problem here. Constant glitches with usb interfaces.
M1 Pro 16'' with 16gb of ram.
I have RME UCX, RME UCX II, NI Komplete Audio 2. All interfaces are basically unusable with this computer.
When i use M1 Air base model, no glitches.
So far nothing has worked (tried every solution found from internet)
I hope apple releases some information because so far haven't seen any comments on this issue from them.