Phantoms take damage riding in a minecart

The bug

As shown in the image phantoms going up or down in a minecart take suffocation damage.

Reproduction steps

1. Build a rail slope as shown below
   
2. Summon a phantom in a minecart

   /summon minecart ~ ~ ~ {Passengers:[{id:"phantom"}]}
   

3. Push the minecart up the slope