I actually had issues on B650M-A, B650-PLUS and also on my personal machine using X670-P mainboards on BIOS 1222.
Looks to me like memory compatibility is sometimes an issue. I have not been able to get the X670-P into a stable state using 4 sticks of G.Skill F5-6000J3038F16G (64GB total). BIOS version 0823 worked out of the box using EXPO-1 default settings but I was unable to find the correct settings to get any stable setup beyond DDR5-3600 defaults on BIOS 1222.
If you face the same configuration issues with your memory try a CMOS reset:
- Unplug power cord
- Shorten the CMOS/RTC reset pin or press cmos reset button for 5-10 seconds
- Re-connect power
- enter EFI setup to re-do your configurationl
- Remember you might run into an unstable system again using anything else than "auto" on the memory tuning - sticking to JEDEC timings
I did also have issues clearing CMOS settings until I noticed that a powered USB hub caused the reset to fail. So if the procedure fails I do recommend also to unplug any USB device before shorting the CLRTC pins to reset the settings.
If everything fails you might use BIOS flashback to revert to the previous version. I am back on 0823 now.