Describe the bug, provide any errors
https://paste.gg/p/anonymous/82abe185c4694b819916d97494c4dbd2

How can we reproduce it?
Steps to reproduce the behavior:

1. Login on 1.8.9
2. enter 1.16.5 server
3. enter nether through the portal
4. disconnect from server and see error in console.

Expected behaviour
1.8.9 client can't enter 1.16.5 server's nether

Screenshots
none

ViaVersion Dump:

• https://dump.viaversion.com/08925abf06f4a7f19f89f9db107e2145dfa6826a2c3c1d4be1831fbf11730c98

Additional server info
Waterfall #415
Purpur #1085

Viaversion dev #508
Viabackwards dev # 303
ViaRewind dev # 213

Checklist (mark with [X] to check)

• I have included a ViaVersion dump
• If applicable, I have included a paste (not a screenshot) of the error
• I have tried a build 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

IMPORTANT: Follow the Checklist or we can't reproduce your issue and your issue will be close

same with #292