"Custom Mob" vex still aggros on the player even with "follow_range" set to 0

The base of this mob is an invisible allay, becuase I wanted the mob to fly around and be attracted to specific items. riding the allay is an invisible ravager and a giant vex. the ravager is there to do damage when the player gets close, and the vex is there to look pretty. I set the vex's "follow_range" attribute to 0, but it's still constantly screaming at the player and trying to attack.
is there any way to fix this?