Version:
1.16.5

Steps to reproduce:
-create an nbtcrafting anvil recipe with the same item id for the base and result

example recipe that causes the bug :

{
    "type": "nbtcrafting:anvil",
    "base": {
        "item": "minecraft:bow"
    },
    "ingredient": {
        "item": "minecraft:stone"
    },
    "result": {
        "item": "minecraft:bow"
    },
    "levels": 5
}

Expected result:
The result item doesn't have any display tag

What happens:
the result item's display.Name is '{"text":""}'