Hello Mark,
Is the SQL database installed on the media server? Are you backing up SQL and the other servers in one backup job? If so, as a test, you could try separating the SQL backup from that of the other servers.
Since you are using the AOFO for other servers, let it be enabled for that job wherein the other servers are backed up.
Then, run the two separate jobs and then verify the result and check if something has changed!
Thanks!!
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