Modpack version:
2.3.1

Description:
Pulverized obsidian in a magma crucible gives molten brass.

Steps to reproduce:
Put pulverized obsidian into a magma crucible.

Expected behavior:
For the pulverized obsidian to give molten obsidian

Definitely very strange, but fixed in 2.4.0 (https://www.curseforge.com/minecraft/modpacks/divine-journey-2/files/3464189).