[Bungee] 1.7 Duplicate Scoreboard Crash

[linsaftw]

Environment:
Proxy: FlameCord (Travertine)
Server: SportPaper 1.8
Affected Client: Vanilla 1.7.10
Running ViaRewind (1.5.3) & ViaVersion (3.2.1) on Bungee

Steps:

1. Join a server that defines a scoreboard objective.
2. Switch to a server that defines a scoreboard objective with the same name.
3. Client crashes because of "Duplicate" scoreboard entry.

This doesn't happen when using ViaRewind on all Spigot servers. This only happens on Bungee version.

[linsaftw]

Logger - ViaRewind Objective Handler:

One of this crashes appear randomly when switching servers.

Crash 1:
java.lang.IllegalArgumentException: A team with the name 'line: §c1§8/§420' already exists!

Crash 2:
java.lang.IllegalArgumentException: An objective with the name '2LSScoreboard' already exists!

As you can see in the log, the objective is added twice without it getting removed.

[linsaftw]

Alright, the problem seems to be that the connection re-inits on server switch which causes Bungee to not detect the old objectives before the switch was done so it can't remove the old objective.

Before adding the "crashing" objective i am receiving a scoreboard packet (mode 1) which means the server is trying to remove the objective but ViaRewind doesn't detect it as an existing objective.

I think this can be fixed by passing the old UserConnection scoreboard values to the new one or removing all scoreboard values before switching to a new server.

[BF138]

Same issue here

[TidySnakeSL-alt]

Please fix it! I have the same issue here :(

[Jojanyu15]

Same issue anyone knows?

[linsaftw]

The issue is still happening. The plugin cannot be run in BungeeCord if the sub-servers have same Scoreboards.

[TidySnakeSL-alt]

Good luck!

[HowardZHY]

Try Protocol Support?

[linsaftw]

Try Protocol Support?

I just switched to ProtocolSupport on all Spigot servers and ViaVersion on BungeeCord. CPU Usage is lower for some reason.

[FlorianMichael]

Can this be reproduced on latest Via* components?