I just ran into one of those non skirmish queens. The escorts were not moving at all and on the first hit just disappeared, they didn't even explode.

The queen behaved and blew up normally.

Ditto in Dau between 2200 and 2300 Pacific. Also, a few bots, but not all, in Dau K-11 at around the same time.

Aye, same in Arta earlier... in fact, it was a double queen, and even one of the queens vanished when shot once.