If there was really a change, this was perhaps the most annoying feature previous daggers had. I kept being pulled close to the mob core when I had intended to just attempt to proc the myth daggs spamming arrows from a certain distance. But no, it would just autolock on something and completely skew the elimination order tactic I was trying to pull. Perhaps I've been a bow user for too long.

More specifically, on topic, try to switch out with magma daggs at the exact spot after the planar knives have failed. See if those bring you close or it was an overall adjustment.