Bedrock Crash Paper-Velocity

[UnperishedFoods]

Describe the bug

When a bedrock player attempts to join an internal Paper server within Velocity, they experience a stutter for about a second and the game crashed. There is nothing in the proxy console (the server Geyser/floodgate is running on) except has disconnected because of bedrock player timed out.

To Reproduce

1. Create a Velocity server network with Geyser and Floodgate installed on it.
2. Add two paper servers, one as the internal and the other as the lobby.
3. Attempt to join via bedrock edition.
4. Experience the crash.

Expected behaviour

I expected bedrock players to be able to join the server smoothly and without crashes.

Screenshots / Videos

No response

Server Version and Plugins

• Clean ping
• Exaroton
• Floodgate
• Geyser
• Luckperns
• Maintenance
• MiniMOTD
• Parties
• SkinsRestorer
• Velocitab

Geyser Dump

https://dump.geysermc.org/I7nY4Sha9KsRBTQ2HxTlRZnic8XBZDtW

Geyser Version

Geyser version 2.1.1-SNAPSHOT (git-master-50d7f56)

Minecraft: Bedrock Edition Device/Version

1.20.1, All

Additional Context

No response

[Konicai]

curious - does use-direct-connection: false change anything?

[UnperishedFoods]

Nope, still broken.

[UnperishedFoods]

What might be the issue?

[Konicai]

Haven't tested anything yet. I'll eventually try to reproduce this myself, but I guess logs with geyser's debug mode enabled might be useful.

[UnperishedFoods]

I’ve mostly given up on trying it with the proxy, I instead just started the paper server and made people directly connect to it instead of through the proxy and it works. If you come up with a fix, let me know!

[gamer50082]

Cannot replicate with velocity + Purpur maybe try Purpur

[UnperishedFoods]

I’ve found that it could be a crash with the tablist, I’ve noticed similar bedrock crashes with scoreboards.

[Recliness]

Having the same issue here. Players with older devices are crashing when attempting to join the server on Velocity/Purpur 1.20.1

[UnperishedFoods]

Does your network, by chance, utilize a scoreboard or custom tablist? I feel as though the issue came from one or the other.

[Folas1337]

FYI, I'm using both a custom tab list as well as a scoreboard. Over the next few days I'll try what fixes this.

The user who kept crashing is not experiencing the problem on a lobby that's basically running no plugins. I'll document my findings here, maybe this leads to more. I just don't have too much time to spare atm but will have more over the next few days.

Maybe this information alone already helps some people :D It certainly was a good hint!

[Folas1337]

This is different from what I expected... I have 3 different worlds in my server called lobby1. I use a plugin called RandomSpawn to spawn people in one of those 3 worlds when they join, just to make it more interesting as all 3 worlds have a different looking spawn.

Java and BE normally have no issue but Pocket Edition seems different, maybe just for certain hardware but I have one player that can very consistently reproduce the crash.

What appears to be happening is that if they rejoin and are sent to a different world than what they left in, it'll crash their clients. Once again, this might not be a PE issue alone but maybe also due to certain hardware (I only had iOS users report it) but it is a thing that I can confirm!

This is the RandomSpawn plugin in question: https://github.com/reflexLabs/RandomSpawn

To reproduce, I suggest setting up velocity with Geyser and Floodgate, a paper server with a few worlds and RandomSpawn installed. Now set up spawn in those different worlds and rejoin with PE, it might crash for you as well.

To make sure it couldn't be any other factor, I ran the same setup with RandomSpawn enabled and the 3 different spawns and they crashed and then did nothing but remove 2 of those 3 spawns and they have not crashed for 6 attempts straight.