1. use command

 /summon villager ~ ~ ~

2. make villager looking at you(get close with him)
3. use command

/execute as @e at @s run tp @s ~ ~ ~ ~ ~

he will turn his head to weird way

and it only happen in non-player ... like if you do so

/execute as @e[type=player] at @s run tp @e[tag=target] ~ ~ ~ ~ ~

every thing just right,they turn to the direction player facing,
but once you execute as a non-player entity...

/execute as @e at @s rotated as @p run tp @s ~ ~ ~ ~ ~

bug was happen again.