[BLOCKING] Riding llama crashes on mobile

Verification builds
1.2.13 rc3 (787050)

Summary
We use the llama entity in a remodeled, and re-textured, fashion to behave as a vehicle that essentially can be ridden/mounted.

Impact
When pressing the on-screen button to "mount" the llama the game hangs and crashes.

Repro Steps
1. import the world provided to @greggo on slack
2. go outside of the spawn, where you will see mini-cars
3. get close to a mini-car
4. press the "Drive mini car" button on the screen

Observed Results:
Game hangs and crashes

Expected Results:
Player is now riding the mini car and can control it to move around the map

Screenshots/Videos attached
No - sent video and content to @greggo on slack

Notes

• This erroneous behavior only happens on mobile
• Attached stack trace from android debug