Game crashes when trying to render this screen for an iron chest shulker box

(Tries to render this screen but can't.)

Crash report:
crash-2019-06-30_17.21.48-client.txt

Steps to replicate:
1: Put an item into Iron chest shulker box.
2: Pick shulker box back up and mouse over it in your inventory.
3: Your game has crashed.

AutoRegLib version: 1.3-31.jar
Quark version: r1.5-167.jar
Iron Chests (Not sure if this is needed but I'll put it in just in case) version: 1.12.2-7.0.69.845.jar
Forge version: 14.23.5.2836

11a4021

Is that going to be in the next update?

Yes...

already solved