A loot table that returns a spawn egg with the entity_data component containing either ArmorDropChances or HandDropChances set to a JSON array of values does not convert the JSON array to a list of float values, causing the tag to reset on any mobs spawned by using that spawn egg.

How to reproduce:

1. Create a world with the attached data pack (MC-274615.zip).
2. Execute the following command:

   /loot give @s loot mc-274615:byte_array

3. While holding the spawn egg you were given, execute the following command:

   /data get entity @s SelectedItem.components."minecraft:entity_data".ArmorDropChances

4. Look at the list of values returned in the chat.
5. Use the spawn egg to spawn a zombie.
6. Execute the following command:

   /data get entity @n[type=minecraft:zombie]

7. Notice that the list of values returned is different from the ones stored in the spawn egg itself.

Expected result:

A mob spawned from a spawn egg with an incorrectly converted ArmorDropChances or HandDropChances tag would use the stored values for that tag.

Observed result:

A mob spawned from a spawn egg with an incorrectly converted ArmorDropChances or HandDropChances tag resets the tag to its default value.

Original description:

Using the following loot table:

{
    "pools": [{
        "rolls": 1,
        "entries": [{
            "type": "item",
            "weight": 1,
            "name": "minecraft:zombie_spawn_egg",
            "functions": [
                {"function": "set_count", "count": 1},
                {
                    "function": "set_components",
                    "components": {
                        "minecraft:entity_data": {
                            "id": "minecraft:zombie",
                            "ArmorItems": [{}, {}, {}, {"id": "minecraft:iron_helmet", "count": 1}],
                            "ArmorDropChances": [0, 0, 0, 0]
                        }
                    }
                }
            ]
        }]
    }]
}

 
It gives spawn egg with entity data like this, which means it got converted into a byte array instead of a list of floats:

The same happens when using "ArmorDropChances": [0.0, 0.0, 0.0, 0.0]. Using a non-zero values like [0.001, 0.001, 0.001, 0.001] anywhere in this list does cause same issue but with 4 doubles instead of floats (also incorrect data type)

When spawning a mob from this item, the ArmorDropChances get overriden with the default value of 0.085f, ignoring array with the incorrect data type.

The same issue happens with HandDropChances.