The system log may show errors when filesystems are mounted or unmounted. For example:
DEBUG: EFS_Umount absolutePath mnt_devname failed
First seen in
Sophos Anti-Virus for Linux 7.6.0
Sophos Anti-Virus for Linux 9.1.0
What To Do
This debugging is informational and does not represent an issue with protection. The messages will be suppressed in a future Talpa update.