Minecart jitters when riding
Nobody has claimed this yet.
- Dominant language
- Java
- Stars
- 12.7k
- Forks
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- Avg merge
- 3d 13h
- Merged PRs (30d)
- 11
Description
Expected behavior
Smooth movement of minecarts
Observed/Actual behavior
Minecarts rubberband for the rider.
The rider's view also rubberbands.
Rubberbanding is not visible to external viewers or when spectating the rider or minecart.
The severity of the rubberbanding isn't consistent. Reconnecting doesn't change it but restarting the server does.
Steps/models to reproduce
Ride in a moving minecart. Going in a straight line makes it more obvious.
Vanilla and spigot are NOT affected.
Fresh server on localhost.
MSPT between 2 and 10.
Plugin and Datapack List
None
Paper version
This server is running Paper version 1.21.5-23-main@5f0b829 (2025-04-19T19:56:53Z) (Implementing API version 1.21.5-R0.1-SNAPSHOT)
Other
Spotted by another user on discord:
https://discord.com/channels/289587909051416579/289587909051416579/1363681671731351762
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the jitter on Paper 1.21.5-23 using a fresh localhost server and a moving minecart, especially in a straight line. Compare the behavior with vanilla and Spigot, and verify that restarting the server changes the result. Done means the rider and rider's view move smoothly without rubberbanding.
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
- Mostly clear
- Newbie friendliness
- 35/100