It's the ages old landtrout maneuver performed by flopstars... annoying, yeah. Been around forever... mostly a coding issue that creates that appearance.
Used to be primarily FW's (roll rate) but I've seen it spread to numerous other airframes, implying it's known and used intentionally. I try avoid it, but I'm sure there are times when it pops up.
I think it's more than that..
As they cross in front of you and you finally get a shot they just roll, or turn or spin..anything to break the plane they were flying in a second ago..
Last MNM when aim assist was enabled for a bit I noticed that the aiming points didn't always lineup with the heading of the aircraft as shown on my front end..sometimes like 90 degrees off
I think that last minute movement throws off the shot as it incorrectly reports a greater change in flight paths than really occur..
I have started it and noticed an improvement of missed shots by my attackers..
As this isn't going to change I suggest everyone try it too
It is not the same rolling until the plane looks like a helicopter on my fe..it is much less noticeable than that freaking looking event imo
You won't see it if you setup aim assist offline as the targets are just flying in circles and don't make any kind of defensive movements
Eagler