Mobs are not turning their body, arms, and legs if they watching you except heads

In lastest of Beta/Preview 1.20.40.21, mobs do not turn to body, arm, legs if is watching you but expect heads.

Happens with villager that doing workstations not turn their body to workstations too

It doesn't affect when they walking.

Not used any addons or texture pack.

Video proof attached.