Describe the bug, provide any errors
No console error.

After login, 1.8 can run commands, talk etc but can't move or place block

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

1. Login with 1.8.9 client
2. Move
3. See you be teleporter back

Expected behaviour
Can play.

ViaVersion Dump:
ViaVersion dump

Additional server info
The plugin "EliTest" only include one event that send message, nothing else.

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 closed

Oups. I didn't tried with dev build of ViaVersion/ViaBackwards.

That's the same. My Via dump: https://dump.viaversion.com/c6487f72b92b3bc6decc64cafe8d2d41b0689f6c3869aa2995f1c3c3c8d0da61

Can't reproduce on a 1.16.1 or 1.21 Server, try if the issue still appears with latest Via* components and without any other plugins installed.