The game crashes when opening the smithing table GUI while running on Fabulous graphics with hitboxes enabled

The Bug

If the smithing table GUI is attempted to be opened while the game is running on Fabulous! graphics with hitboxes enabled, the game crashes.

See the crash report attached. 

Steps to Reproduce

1. Enable the Fabulous! graphics setting and turn on hitboxes using F3+B.
2. Place down a smithing table and right-click on it to open the GUI.

Observed Results

The game crashes when right-clicking on the smithing table.

Expected Results

The game should not crash.