Minecraft Version

1.19.2

KubeJS Version

kubejs-forge-1902.6.2-build.73

Rhino Version

rhino-forge-1902.2.3-build.284

Architectury Version

architectury-6.6.92-forge

Forge/Fabric Version

43.4.4

Describe your issue

This is the most cursed bug I've ever had to debug...

I just spent 10 hours finding the cause and creating a minimal reproducible mod list:

Minimal reproducible mod list:

architectury-6.6.92-forge
blueprint-1.19.2-6.2.0
FarmersDelight-1.19.2-1.2.4
kubejs-forge-1902.6.2-build.73
rhino-forge-1902.2.3-build.284

Add this script in server scripts:

ServerEvents.recipes(event => {
//Yes it's empty
})

If we remove at least one item from the list above, including the script, the bug stops happening.
Trigger of bug is any ServerEvents.recipes, even empty. Without it it wouldn't happen.

Bug:
Pigs start following the player if they hold minecraft:air (empty) in at least one hand.
We can succesfuly multiply pigs with empty hand.
Also, we can successfully feed a baby pig with an empty hand.

Reason:
https://github.com/team-abnormals/blueprint/blob/1.19.x/src/main/java/com/teamabnormals/blueprint/core/Blueprint.java#L201
https://github.com/vectorwing/FarmersDelight/blob/1.19/src/main/java/vectorwing/farmersdelight/common/CommonSetup.java#L124

I think KubeJS somehow breaks one of these mods, causing it to add Null as Pig.FOOD_ITEMS instead of the intended item.
Null is then interpreted as minecraft:air(empty hand). So bug starts to happen.

Crash report/logs

No response

Tried to do some prints.

LOGGER.info(Arrays.toString(Ingredient.of(BlueprintItemTags.PIG_FOOD).getItems()));

Problem is KubeJS replaces [1 barrier] with [] in BlueprintItemTags.PIG_FOOD
So [] starts working as minecraft:air.

tmp solution:

ServerEvents.tags('item', event => {
    event.add('blueprint:pig_food', 'minecraft:carrot')
})