Expected Behavior

Oven should probably process iron ore, creating 1 iron ingot and 4 iron nuggets without needing to consume clay jars.

Actual Behavior

Without clay jars, processing 1 iron ore in the oven produces only 1 ingot, no nuggets.
With clay jars, processing 1 iron ore in the oven produces 1 ingot, 4 nuggets, and consumes the clay jar.

Steps to Reproduce

Place a oven, put fuel and 1 iron ore in the oven.
Next, put fuel, 1 iron ore, and a clay jar in the oven.

Version of Minecraft, Bewitchment, Forge, Patchouli, LLibrary and Baubles used

MC 1.12.2
Bewitchment 0.0.19.10-indev
Forge 14.23.5.2815
Patchouli 1.0-17
LLibrary 1.7.17
Baubles 1.5.2

Screenshots

According to JEI
Result (without clay jars)
Result (with 1 clay jar)