I was doing some botting earlier, and I noticed that the collectors I was fighting weren't responding when I shot them (while they were already doing something else, e.g. Mining or going to a 'roid in order to mine). They just continued with whatever they were up to, no matter how long I waited after shooting them once.

However, when new bots spawned, if they were within a certain distance of me, they automatically attacked me (one followed me around the sector for a good 10 min).

Now, the reason I was fighting collectors was because the convoys didn't seem to be on, but a few minutes after I stopped botting to go race in the Deneb Run, the convoys turned on, and so I don't know how they would have acted if the 'voys were running.

Is it supposed to be like this now, or does this denote a bug in the new AI script?

It was a bug; it's now fixed.

Yep, I was on when it was fixed (a.k.a. the time when the server went down). At least it was fixed when it came back up... =D