shulker box client inventory bug

[oPURPo]

/viaversion dump Output

https://dump.viaversion.com/41cde28527f854920e3bfcad1ce538fac28c694b77e072e041e0966a8b865ae4

Server/Client Error

(https://mclo.gs/iMDmdeW)

Bug Description

bug is when you have a shulker that comes from 26.1 player with items that the player put in it and is given or managed by 1.21.11 it crashes their game

Steps to Reproduce

1. server with fabric 26.1
2. player on 26.1 gets a shulker box and puts items in it
3. these are the ways ive seen it to crash the connection to the server 4-6
4. on client 1.21.11. player breaks said shulker box that would drop it onto the ground
5. on client 1.21.11. if shulker is in any chest including ender chest, and the player opens the chest with the shulker box in it
6. on client 1.21.11. after being on client version 26.1 and putting that shulker in the inventory, if you switch back to the 1.21.11 it will crash right away without letting you load in

Additional Server Info

No velocity
no proxy
fabric 26.1 server
fabric api mod
viafabric mod
viabackwards mod

Checklist

• I have checked if this is specific to ViaFabric platform, and doesn't happen when running it on other platforms (Paper/Sponge/Velocity).
• 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.

[oPURPo]

did a bit more testing and it seems that the error is happening only when there is an item in the top right chest slot of the shulker with ways 4-6 still being accurate but the correct orentation of the shulker is item needs to be in the top right of the shullker