Cloning chests leads to "Chestban"

[Archie-osu]

Expected behavior
I can have whatever I want in my inventory without getting kicked / "banned".

Observed behavior
I get kicked after cloning (Ctrl + Middle Click in Creative Mode) a Chest with 3 shulkers of ban books (books filled up with random characters on all 50 pages). After getting kicked, you cannot join back unless an Admin wipes your inventory, hence me calling it a "ban".

Steps to reproduce (if known)

1. Get ForgeHax and ViaForge (I used the 1.12.2 version to write these)
2. Download the randombook.txt file (Click here)
3. Set up BookBot
4. Follow this video (Click here)

Installed plugins
None.

> plugins
[18:11:45 INFO]: Plugins (0): 

Version
Latest Yatopia 1.16.5 (non-staging)

> version
[18:11:47 INFO]: This server is running Yatopia version git-Yatopia-17 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)
[18:11:47 INFO]: Previous version: git-Yatopia-14 (MC: 1.16.5)
[18:11:47 INFO]: ¯\_(ツ)_/¯

Additional context
This doesn't only happen with books, it happens with any items with NBT (player heads, enchanted items, etc.) - it just needs more shulkers. Books seem to be the most effective. I also tried using Droppers to drop three separate shulkers of these ban books to the player (at once), yet the player doesn't get kicked that way.

[Titaniumtown]

Can you reproduce this upstream? I think this happens in vanilla too.

[Archie-osu]

Can you reproduce this upstream? I think this happens in vanilla too.

Yeah, it happens with Vanilla too, but with a different error:
Internal Exception: io.netty.handler.codec.DecoderException: Badly compressed packet - size of 2254248 is larger than protocol maximum of 2097152

[Titaniumtown]

So this is a vanilla issue then. But would be interesting to implement a fix for this.
@duplexsystem thoughts?