PaperMC / PaperMC/Paper

Riding minecart through gateway portal causes client server de-sync

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status: accepted type: bug upstream: bukkit version: 1.19
Dominant language
Java
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Expected behavior

The player should be teleported and remain traveling in the minecart.

Observed/Actual behavior

Player and minecart are teleported however the minecart is invisible clientside and the client is stuck mid air unable to look around or move (including dismounting the minecart)

Steps/models to reproduce

Ride a minecart through an end gateway portal.

Plugin list

None

Paper version

version
[18:43:56 INFO]: This server is running Paper version git-Paper-575 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)
You are running the latest version

Agreements
  • I am running the latest version of Paper available from https://papermc.io/downloads.
  • I have searched for and ensured there isn't already an open issue regarding this.
  • My version of Minecraft is supported by Paper.

Contributor guide

Open the contributing guide

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

The issue names no files, tests, or entry points. Start by reproducing the desynchronization while riding a minecart through an end gateway on Paper 1.16.5, then trace the portal transfer and client entity updates. Done means the player and minecart remain synchronized, the minecart is visible, and the player can look around, move, or dismount.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend, game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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