Describe the bug, provide any errors
basically the title

How can we reproduce it?
Steps to reproduce the behavior:
in my case use 1.8.9 client on a 1.15.2 server and spawn falling blocks of end bricks

Expected behaviour
no kick

Screenshots
https://streamable.com/2fg7r4 (zurina is the player on the 1.8 client)
https://cdn.discordapp.com/attachments/216678365766090752/831276579996172388/image0.png

ViaVersion Dump:
https://dump.viaversion.com/94b3eabeda228edaf1e98b97dcd85f65e8e80a2d13489eadf4f336f2c43dace5

Additional server info
I use waterfall for proxy

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

Hi, I tried out multiple falling blocks but I can't get to reproduce the issue on latest Via* plugins:

Also the links are not working so I can't read the kick message either, I just guess it's a plugin issue or something which got fixed in the meantime.