[MC-271573] Attribute Enchantments Don't Behave Properly on Armor

If you have a custom enchantment, that say gives you extra health (or any other attribute), there are two weird bugs that I've found can occur:

The attribute only gets applied for one piece of armor
When taking off armor pieces, the attribute modifiers can be removed completely even while still wearing armor

See attached datapack.

How to recreate:

Go into a normal world with the installed datapack.
Get any two pieces of trimmable armor
Enchant them with their respective "health" enchantments found in the datapack
Put on both pieces of armor and observe how only one effect is applied
Remove one piece of armor and observe how no effects are applied

Linked issues

is duplicated by 2

MC-271931 Property explosion_knockback_resistance incorrectly reduced Resolved

MC-271942 Attributes on armor enchantments are forced to have the same UUID, making them impossible to stack. Resolved

Attachments

Custom Enchantments.zip

Comments 3

ccJerrycc 2024-05-05T02:23:05Z

related to MC-16466

jacobsjo 2024-05-10T23:07:22Z

I can confirm the behavior described using the attached datapack in 24w19b. The attached datapack uses separate enchantments for each armor piece but the same UUID for all attribute modifiers. So this behavior is probably WAI.

Wyvernity 2024-05-17T11:28:36Z

Can confirm in 24w20a. This is due attribute slots being unavailable in custom enchantments. Since the UUID of the attribute is the same, only 1 gets applied when multiple armor pieces are worn.