Version Information

lithium-fabric-mc1.21-0.13.0

Expected Behavior

If a player is riding an entity with high Motion data, they should travel together.

Actual Behavior

If a player is riding an entity with high enough Motion data, they occasionally get stuck in unloaded chunks

Reproduction Steps

Create a high motion entity (for example by using lazy linking and lazy acceleration), ride the entity, and observe being stuck sometimes. By using /forceload add ~ ~ you can move another step.

Other Information

This only occurs with the mixin mixin.world.inline_block_access ON, which is it's default. If it's OFF this doesn't happen.
Videos of these 2 scenarios (mixin ON and mixin OFF) have been provided as attachment.
https://github.com/user-attachments/assets/2ec66c6c-237c-4a67-af3b-ae2b91adff6e
https://github.com/user-attachments/assets/c3eac4db-7ff1-4062-8471-aed2d4daa98e

Needs investigation why this happens, possible mod compatibility issue, but could also be caused by lithium directly

Was the root cause of this ever found?

No, but also noone tried