1.13/1.13.1 clients cannot join velocity->paper 1.20.4

[Kichura]

'/viaversion dump' Output

https://dump.viaversion.com/e69757425c33e0584c6b39d69ae7350ddedae20293b6a8fa5037ab081ba1dc09

Console Error

(No console errors but client kick was found here)

Bug Description

When attempting to a velocity proxy that is paired with an Paper 1.20.4 server running via* plugins, the 1.13/1.13.1 clients instantly drop and cannot log in unless the client was on 1.13.2.

Steps to Reproduce

1. Create a velocity proxy regardless of forwarding modes,
2. Create a Paper 1.20.4 server with the via* plugins on it,
3. Try to connect to server with an 1.13/1.13.1 client,
4. Get kicked out.

Expected Behavior

1.13/1.13.1 clients can log in properly without issues.

Additional Server Info

1. Yes - This setup is using Velocity, (Build 316)
2. Paper 1.20.4 as backend server,
3. ViaVersion (4.9.3-SNAPSHOT), ViaBackwards (4.9.2-SNAPSHOT) and ViaRewind (3.0.6-SNAPSHOT).

EDIT: This not only affects velocity proxies but bungee itself as a whole.

Checklist

• [X] Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. BungeeCord), not on both.
• [X] I have included a ViaVersion dump.
• [X] If applicable, I have included a paste (not a screenshot) of the error.
• [X] I have tried a build from https://ci.viaversion.com/ and the issue still persists.

[Barvalg]

[Jo0001]

Works fine now