MinimServer is preventing my Synology NAS from hibernating

[haggis999]

A recent, and long overdue, tidy up of my study made the disk LEDs on my primary Synology NAS DS412+ visible for the first time in several years. It then became obvious that it was failing to go into hibernation when I was not using the NAS, which was set to hibernate after 15 minutes of inactivity.

I reduced the hibernation timeout to the minimum of 10 minutes and then spent some time today working through a lengthy Synology checklist for hibernation failures. The final action I took was to disable MinimServer. About 10 minutes later the NAS went into hibernation mode.

I reactivated MinimServer, which obviously cancelled hibernation, but played no music and made no other use of the NAS for over an hour. All the disk LEDs on my NAS remained solidly lit up and hibernation was not reactivated. I repeated this procedure two more times. Hibernation worked every time MinimServer was stopped and failed when MinimServer was turned on (but unused).

How do I fix this?