xpissue.json

{
  "rules": [
    {
      "debug": true,
      "match": {
        "blocks": {
          "blocks": [
            "minecraft:coal_ore"
          ]
        }
      },
      "drops": [
        {
          "item": {
            "items": [
              "minecraft:bone:0"
            ],
            "xp": {
              "fixed": 0
            },
            "xpReplaceStrategy": "REPLACE"
          }
        }
      ]
    }
  ]
}