Same errors here with NON ECC RAM : ASUS x570 Strix E, 3900x, 2x16GB Gskill Trident z Neo running on XMP 3600Mhz.
Installed BIOS is newest Version: 1407 https://www.asus.com/Motherboards/ROG-Strix-X570-E-Gaming/HelpDesk_BIOS/
This didn't happen on 6.8.x.
Also I get some other CPU related hardware error. This one I also got on 6.8.x:
mce: [Hardware Error]: Machine check events logged
Mar 14 11:27:19 XXX kernel: [Hardware Error]: Corrected error, no action required.
Mar 14 11:27:19 XXX kernel: [Hardware Error]: CPU:0 (17:71:0) MC27_STATUS[-|CE|MiscV|-|-|-|SyndV|-|-|-]: 0x982000000002080b
Mar 14 11:27:19 XXX kernel: [Hardware Error]: IPID: 0x0001002e00000500, Syndrome: 0x000000005a020001
Mar 14 11:27:19 XXX kernel: [Hardware Error]: Power, Interrupts, etc. Ext. Error Code: 2, Link Error.
Mar 14 11:27:19 XXX kernel: [Hardware Error]: cache level: L3/GEN, mem/io: IO, mem-tx: GEN, part-proc: SRC (no timeout)