I think I found a bug in Sophos UTM 9.2 Beta, while using VMWare Vsphere. Whenever I revert back to a previous snapshot, I receive the following message: Your license has expired. Entered my license and continued my work.
A few hours later I tried it again because it was pretty remarkable since it was only 6 weeks ago that I entered a new license. So I reverted again to see if this was just a one timer, and suprisingly the same message appeared again. Your license has expired.
P.S
Just tested the Backup/Restore utility in UTM itself. Same issue, need to enter an license in order to continue.