Most of the recent messages I've gotten have said "the server has been placed offline by the operator." The offline incidents have been very brief, and would be consistent with what I'd expect if "the operator" just needed to copy a new (edited?) file to the server drive(s) or extract one to work on offline.

Totaly incosnistant IMO. John. Unless you know a human capable of analysing what needs to be done, making the decision, and performing those action within intervals of less than a second and maintaining that process for several hours (having started from a point where I first saw it this time round 10am that day when it was running at about 1 per 30 minutes and built up in pace from there over the day).