Please fill in this template rather than deleting it

Describe the bug, provide any errors
https://pastebin.com/7AYGe4Nu

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

1. use 1.8.9 client to join 1.16.5 server

Expected behaviour
use 1.8.9 client to join 1.16.5 server and show
Internal Exception: io.netty.handler.codec.EncoderException: us.myles.ViaVersion.exception.InformativeException: Please post this error to https://github.com/ViaVersion/ViaVersion/issues and follow the issue template {Source 0: de.gerrygames.viarewind.protocol.protocol1_8to1_9.packets.EntityPackets$11 (Anonymous), Source 2: nl.matsv.viabackwards.protocol.protocol1_15_2to1_16.packets.BlockItemPackets1_16$2 (Anonymous), Source 1: nl.matsv.viabackwards.protocol.protocol1_15_2to1_16.packets.BlockItemPackets1_16$2$$Lambda$4641/1506035143} Actual Error:

Screenshots
If applicable, add screenshots to help explain your problem.

ViaVersion Dump
https://dump.viaversion.com/5b933f6b5b684250a3fcf38d3d57d2524c85e69cd00d86c8e5bd8a1bdee14cb2

Additional server info
proxy: waterfall
backend:1.16.5