Phantoms don't attack / come down to the play enough

Whenever phantoms spawn in the sky they only seem to attack the player once and then they just stay in the sky, this should not happen.

 

video is linked here: https://drive.google.com/file/d/1rWOZgcgwHF-1VACHFOxPSFGEx14WWmPQ/view?usp=sharing