I noticed some seemly random issues with my SMB shares since updating from 6.9 to 6.10.2. The latest example is losing access to a media share in the span of 6 hours after making no changes to any systems. It literally worked at 3am, I went to sleep, I then woke up and found I had lost access to the SMB share. Bizarre stuff...
Log entries (identifying info removed):
[2022/06/10 12:02:55.282902, 0] ../../source3/auth/auth_util.c:1927(check_account)