BLAKE3 unstability?

From: Evgeniy Khramtsov <evgeniy_at_khramtsov.org>
Date: Sat, 09 Jul 2022 16:26:40 UTC 
-CURRENT as of:

commit eec3290266bc09b4c4b4d875d2269d611adc0016 (main)
Author: Ganbold Tsagaankhuu <ganbold@FreeBSD.org>
Date:   Sat Jul 9 13:06:52 2022 +0000

    Add RK3568 SoC support to pinctrl driver.
        
    Submitted by:   sos
    Reviewed by:    manu
    Differential Revision:
    https://reviews.freebsd.org/D31330

New boot environment created via bectl, zfs set checksum=blake3 new_be,
pkg -r /tmp/be_N upgrade, reboot into new BE, login failed after
sysutils/pam_xdg failed integrity check.

Rebooted into previous BE, did zpool scrub and got 32 checksum errors
without files specified before getting panic (no trace due to drm-kmod?).

bectl destroy / zfs destroy of new env with blake3 restored pool back to
0 checksum error state.

No out-of-tree base modifications present, only a custom kernel config.