Projectiles launched by the player fall through blocks, sometimes into the void, when player moves far away

Player-launched projectiles, for example tridents in a trident killer, will fall into the void once the chunk is unloaded.

Steps to Reproduce:

1. Open creative world
2. Throw a trident
3. Move render_distance + 5 chunks (or render_distance * 16 + 95 blocks) away.
4. Return and trident is gone

Expected Results:
Thrown tridents should not be lost when the player moves away.