The momentum and motion of a entity will be reset when a player mounts it

If a player is mounts a boat when it is in motion, the boat will briefly stop in place and reset all it's momentum and motion, , and allow the player to mount the boat again.

Steps to Reproduce

1. Build a tall pillar going upwards (~20 or so blocks, not exact)
2. Place a boat down on top of the pillar, and mount it
3. Mount the boat and ride it off the pillar
4. Quickly dismount the boat, and then immediately mount it again

Expected & Observed Results:

→ The boat will freeze in place, losing all it's downward momentum.
→ The boat woul continue to fall downwards regardless of whether the player has mounted or dismounted it.

Screenshots / Videos:

Provided by [Mod] Avoma
MC-174877.mp4

Notes:

Related to:
MC-263713 MC-119369 MC-207949 MC-175299 MC-128886