I am seeing the same. I recently updated 3 servers from Zentyal 6.2 to 7.0 and here is a scrubbed snippet from /var/log/syslog:
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|getxattr|fail (No data available)|/home/samba/shares/sharename|user.DOSATTRIB
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|get_dos_attributes|fail (No data available)|/home/samba/shares/sharename
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|create_file|fail (Is a directory)|0x100080|file|open|/home/samba/shares/sharename
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|getxattr|fail (No data available)|/home/samba/shares/sharename|user.DOSATTRIB
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|get_dos_attributes|fail (No data available)|/home/samba/shares/sharename
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|getxattr|fail (No data available)|/home/samba/shares/sharename|user.DOSATTRIB
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|get_dos_attributes|fail (No data available)|/home/samba/shares/sharename
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|getxattr|fail (No data available)|/home/samba/shares/sharename|user.DOSATTRIB
Dec 18 21:01:09 dc_name smbd_audit: DOMAIN\username|xx.xx.xx.xx|get_dos_attributes|fail (No data available)|/home/samba/shares/sharename
The server seems to work correctly, and I've tried a few ideas ( apt install attr and apt install xattr) but nothing I've tried has helped.
Anyone have any ideas on how to fix tihs?