Entity Riding Being Stuck in the Player's Face

Hello! I have a modded entity that I want the player to be able to pick up, and the entity will ride the player's head. Currently, whenever the entity rides the player, it gets stuck in the player's face, which results in the player seeing inside it, and the hitbox being the only thing the player can interact with. How would I get the entity to ride on top of the player? There may be something obvious I'm just missing.