Ships bridge logs don’t really give very much other than visual sightings passed to the bridge of presumed UAV’s. There’s no indication that radar picked up anything. Rather than confirm the object the destroyers did something interesting... they limited their electronic emissions. Almost like they didn’t want to get additional confirmation as to size, speed & heading of their aerial target. Curious. An actual radar plot would have been useful.
As you say, it is quite curious.
That said, I have no idea what is going on, but it appears that these reports dovetail with the Pentagon report due to be submitted soon to the Senate Select Committee on Intelligence.