I called the IRS a week ago for the same thing (no refund after several weeks).  The client had unemployment included on the return and had filed before the ARP was enacted.  He was also claiming the Recovery Rebate credit for an additional child. The agent said ('unofficially') that they were having trouble verifying unemployment received with some states, also in verifying the recovery rebate. His return had been sent to the Area Resolution dept. and is expected to be processed/resolved without any taxpayer contact.

I am not sure how many clients will be affected by this same situation.