(Java Minecraft 1.14) Loot table reward won't stack with /given item, even though they have the same nbt?

I have an item in a datapack which has a supplemental function to give it straight to the player (for testing), and an entry in a loot table (which is how survival players get it). I recently noticed that these two items will not stack, under any circumstances, even though they should have the exact same nbt data. The /give command looks like this:

give @s minecraft:quartz{dmd_dark_quartz:1b,CustomModelData:256,display:{Name:"{"text":"Dark Quartz","color":"dark_purple","italic":"false"}"}} 1

While the loot table looks like this:

{
  "type": "minecraft:item",
  "conditions": [
    {
      "condition": "random_chance",
      "chance": 0.75
    }
  ],
  "functions": [
    {
      "function": "set_name",
      "name": {"text":"Dark Quartz","color":"dark_purple","italic":"false"}
    },
    {
      "function": "set_nbt",
      "tag": "{dmd_dark_quartz:1b,CustomModelData:256}"
    },
    {
       "function": "minecraft:explosion_decay"
    }
  ],
  "name": "minecraft:quartz"
}

When I hold the two items in my hand and use /data get entity @s SelectedItem, the only difference is that there are no quotes surrounding the false value for italics in the loot table version. Here’s a picture for further clarification of what I mean:

I underlined the false values that were different. Does anyone know if this is a bug or what causes this? I think it’s probably a bug because all other values ("dark_purple", for example) have the quotes, but that singular one doesn’t. Is it because it is a true/false value and doesn’t need quotes? I would prefer if they stacked because then testing would be easier and I wouldn’t have to test both versions for everything, but not including quotes in the /give command seems a bit sacrilegious.

Upon further testing, not including the quotes in the /give command gives an item that has the exact same nbt (so the /data get looks exactly the same) as the loot table version but still doesn’t stack with either one.

Any answers on why this is happening?