[Samba] Strange logs: check_usershare_stat: file /var/lib/samba/usershares/ owned by uid 0 is not a regular file

[Roy Eastwood]

These logs:

	Dec  1 09:31:16 lxd-m1 smbd[26323]:   check_usershare_stat: file /var/lib/samba/usershares/ owned by uid 0 is not a regular
file

have started to appear this morning in sysvol.   25 such logs appeared within a minute.  No changes have been made for some time on
this machine.  It's a member server running samba 4.13.2 on Debian Buster.    Is this a known bug?

Regards,
Roy