/viaversion dump Output

https://dump.viaversion.com/a49809b850fd06dd0196b990141155237b1917cccda73d7b764a758a550afa6c

Console Error

https://pastebin.com/QYjJa2bx

Bug Description

It started to appear in my server log after this commit: 4ded017

Steps to Reproduce

1. Login with 1.8 client.
2. Hit other players.
3. You will be randomly (once per hour) disconnected with the crash.

Expected Behavior

Crash should not appear

Additional Server Info

No response

Checklist

• Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. BungeeCord), not on both.
• I have included a ViaVersion dump.
• If applicable, I have included a paste (not a screenshot) of the error.
• I have tried the latest build(s) from https://ci.viaversion.com/ and the issue still persists.
• I have looked at https://www.spigotmc.org/resources/viarewind-legacy-support.52924/ and it does not offer a fix for my problem

Please try the latest build(s) from https://ci.viaversion.com/. In case the issue still persists send the new dump