I had an event recently where I sent a Paragon escorted by two Champions against a fleet of... something-or-other. Can't remember if it was remnant or pirates, just that it was a couple cruisers and a bunch of destroyers and frigates. Anyway, the Champions hung back, off to the side, outside their own weapon ranges, fluxless while the Paragon was getting torn up. They were ordered to escort the Paragon and all officers were either steady or aggressive. Current biggest example of AI stupidity I've seen so far, and usually doesn't happen. Usually, the Champions properly support their capital ship.
I'll try to get a save if it happens again, but I've got nothing right now.