All of the different pieces of Quantum Armor stack to 64 in Modern Industrialization 2.2.29 in Minecraft 1.21.1 and NeoForge 21.1.90, when they should not stack at all. This may be caused by an uninitialized stack size component reverting to its default value of 64.

To reproduce: create two or more of the same piece of Quantum Armor and try to stack them together.

Attempting to enchant such stacked armor creates an infinite loop with infinite CPU usage on one core.