melee mobs will stop before hitting the player

when running away from melee mobs they will stop before they hit the player and sometimes it seems to lose interest on the player.

how to reproduce:
1:create a superflat world(set it up for no mob spawning so you don't have to deal with slimes)
2:spawn a baby husk(to avoid using too much commands)
3:just walk in survival either using the third person view or looking at him
4:done

i have noticed this several times when a vindicator is trying to hit me in the middle of a raid and then now i got myself running away from a baby zombie but never got hit by it so when i turned to see it and i saw how he stopped every time its about to hit me i have attached a video as an example this one is on 21w11a but affects 1.16.5 too. as far as im aware it happens on 1.13/1.12/1.11 and 1.10 but i can't select them