Reinforcements on Manyullyn boots crashes game on crouch

[04Slash]

Forge Version:
Forge-14.23.5.2854 - (Currently the latest for 1.12.2)

Mod list:
Baubles-1.12-1.5.2.jar
Mantle-1.12-1.3.3.55.jar
TConstruct-1.12.2-2.13.0.183.jar
tinkersdefense-1.4.2.38.jar
No other mods are present. All mods are updated to their latest versions.

Log file:
Crash-report.
latest.log

Steps to reproduce:

1. Create a creative world - (Crash also happens in survival)
2. Grab yourself a tool forge, Manyullyn Sabatons (boots), and 1 Reinforcement
3. Apply the Reinforcement to the boots. Only 1 level of Reinforced is required to cause a crash.
4. Equip boots
5. Crouch
6. Crash.