[EDITed for clarity]
There is something wonky with the AI/auto targeting.
I sent a couple ships to attack an enemy gravwell. There were 3 fleets: One composed of my flagship, another a capital ship, and the third was mostly corvettes, but some LF and Hoshikos too.
There was a capital ship and some LF, I queued most of the enemy LF as target with my corvette fleet, and went about other matters, since this AI enemy was toast already.
When I came back to it, the target queue was gone [as in targeted ships killed, not as in game lost track of it. I think ], and I noticed a most weird behaviour.My corvetter fleet seemed to be commanded by the game in 2 separate groups. One group did the flyby thing and attacked the enemy capital ship, then stalled, not moving or attacking. The second group proceeded to do its flyby, then stopped, and the first group resumed attacking.Once I selected the fleet and manually told them to attack the capital ship, all of them started moving at once without stalling.
I noticed the half-and-half move-and-attack behaviour on AI controlled ships too.