Potomac is even worse than Calif... Don't worry Calif is moving they are not stuck at 10th Sep. it should move.. I believe Calif is done with all the Aug-2021 cases, all the Aug-2021 cases which are not updated in the timeline is because those users hasn't signed up to the portal for awhile and they moved on I guess. I took look at the rest of the cases transferred to Cali
Approved 4 out of 9 Sep-2021 cases
Approved 1 out of 22 Oct-2021 cases
Approved 0 out of 5 Nov-2021 cases (I am in Nov)
Approved 0 out of 5 Dec-2021 cases.
Go Calif, Go CSC, Go California, GO USCIS, SPEED UP.