Worked for me to revert back to 12, but the initial attempt to downgrade through SS did fail and I had to do an emergency repair. Once that was complete, I was just on 12 and everything worked.
You need to withdraw from the beta from Samsung Members -> Settings -> One UI Beta Program Status -> Withdraw. Then plug the phone into your PC, open up the PC version of smart Switch. Be sure to back up your phone since downgrading requires a factory reset. We recommend you try backing up your device and performing a master before moving back to Android 12.
If the steps above do not restore your phone to Android 12, please take it to a Samsung service center. We apologize for any inconvenience.
