I'm having the same issue on my brand new PC with a MSI X870 Gaming Plus Wifi mobo. So it's just a BIOS thing and I should wait and hope that the next version fixes this (I'm on the latest one rn)? The RAM seems to be working fine and getting no errors in test.
Edit: rolling back to a previous BIOS version seem to have mostly helped, but I'm still getting incorrect readings or "stuck" readings, like it suddenly reporting 0C temp on one of the RAM sticks which doesn't change until I restart HWinfo.