Teleporting a happy ghast with riders to its current position causes it to move downwards

When player(s) are riding a happy ghast and the ghast is teleported to position ~ ~ ~, it will move downwards instead of staying in place.

To reproduce:

1. Mount a happy ghast

2. Run command:

/execute as @e[type=happy_ghast] at @s run tp @s ~ ~ ~

1. Notice the happy ghast moves downwards instead of staying in place

   1. Expected behavior: Happy ghast remains in the same spot

   2. Actual behavior: Happy ghast moves downwards

2. Dismount the ghast and run the command again to notice the ghast stays in place with no riders.

Note that this does not occur with other rideable entities (boats/llamas).