PaperMC / PaperMC/Folia

Teleporting an entity does not preserve motion

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status: needs triage type: bug
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Description

Expected behavior

calling entity.teleportAsync(destination, PlayerTeleportEvent.TeleportCause.PLUGIN, TeleportFlag.Relative.values()) should preserve the entity's motion after teleportation

Observed/Actual behavior

motion is not preserved

Steps/models to reproduce
  1. teleport an entity with relative teleport flags specified
    entity.teleportAsync(destination, PlayerTeleportEvent.TeleportCause.PLUGIN, TeleportFlag.Relative.values())
  2. motion is reset…
Plugin and Datapack List

unrelated

Folia version

[18:01:37 INFO]: Checking version, please wait...
[18:01:37 INFO]: This server is running Folia version 1.21.11-11-ver/1.21.11@e112b00 (2026-01-20T18:53:05Z) (Implementing API version 1.21.11-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.11-100-4873e3f (MC: 1.21.11)

Other

No response

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the entity.teleportAsync entry point and trace how TeleportFlag.Relative.values() is handled during teleportation. Reproduce the issue with the call shown in the report, then verify that the entity's motion is retained when relative teleport flags are supplied.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
game-dev
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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