Crashes because reinforced shulkers have more than 27 slots.

Minecraft version: 1.21
Modloader: Fabric
Fabric loader version: 0.16.3
Environment: Multiplayer

First mod name: Quick Right-Click
First mod version: 1.21.1-1.5

Second mod name: Reinforced Shulker Boxes
Second mod version: 3.1.0+1.21

Description

Right click in the air while holding a netherite shulker box kicks player from the server and crashes the client. The server remains unaffected.

Crash report

Unexpected error: java.lang.ArrayIndexOutOfBoundsException: Index 27 out of bounds for length 27......