Restauration snapshot missing nas storage

I use my Synology NAS to store my backups.
I have therefore mounted my shared network drive via CIFS.
If I backup to it and then import it into a new installation of Home Assistant, I successfully recover my setup, but the CIFS network drive disappears. I have to remount it manually each time.
Did I do something wrong?
Thank you.

Any idea please ?

Nobody has never got this problem ??