Michael, - Yes, I've tested a number of other music files and they all repeat as expected and MA continues to run. - It's just Jim's default track, as downloaded, that for whatever reason, closes down the aquarium at the end of its first run-through.
When I first realised that MA3 was constantly closing down after a set period of time, I never assumed or expected it would be linked with the default music. - After my opinions about having ANY music backing for an aquarium, I think I would probably have expected to get lynched!
Perhaps it IS retribution, - for NOT wanting Muzak!