[Affecting Live Content] Teleporting an entity sometimes dismounts a riding player.

Verification Builds: 937076

Summary: When teleporting an entity being ridden by the player, the player is sometimes automatically dismounted from the entity although they are still teleported to the correct location.

Impact: This breaks the final race in Ultimate Pig Race.

Repro Steps:

1. Open Ultimate Pig Race
2. Press the green button on the right to switch to the final level, called 'Great Hall'.
3. Start the level.
4. Playing through the level, ride the pig down the first drop and over the first patch of slime blocks.
5. Fall off of the track to one side while crossing the second set of slime blocks.

Observed Results: The player and the pig are teleported to the start of the track, but the player is no longer riding the pig.

Expected Results: The player and the pig are teleported to the start of the track, with the player still riding the pig.

Screenshots / Videos Attached: No.