Upgrades not kept when /remove mixing tables

mixing tables do not keep the upgrades when you use /remove on it. a normal furnace does so the issues is just with the mixing table. picking up with normal hammer does preserve it for both furnaces and mixing table.

heres my config:

{
  "General Settings": {
    "Only the owner can upgrade the furnace": false,
    "Only teammates can upgrade the furnace": false,
    "Only Allow Oven Toggling by Owner & Team": false,
    "Keep attributes when removing": true,
    "Requires upgrade button permission": false,
    "Requires show status permission": false,
    "Show furnace item cooking animation": true
  },
  "Currency Settings": {
    "Currency type (0 - Scrap | 1 - Economics | 2 - Server Rewards)": 0,
    "Currency item (if the currency type is '0')": {
      "Short name": "scrap",
      "Skin ID": 0
    }
  },
  "Visual Settings": {
    "Use chat messages": true,
    "Notification plugin (0 - None | 1 - Toastify | 2 - Notify)": 1,
    "Toastify notification ID": "success",
    "Notify notification type": 0,
    "Upgrade effect (empty = disabled)": "assets/bundled/prefabs/fx/build/promote_stone.prefab"
  },
  "UI Settings": {
    "Disable status panel": false,
    "Upgrade button": {
      "Anchor": "0.5 0 0.5 0",
      "Offset": "400 109.5 480 141.5",
      "Background color": "0.45 0.63 0.19 1",
      "Font size": 13
    },
    "Upgrade button on electric furnaces": {
      "Anchor": "0.5 0 0.5 0",
      "Offset": "492 354.5 572 386.5",
      "Background color": "0.45 0.63 0.19 1",
      "Font size": 13
    },
    "Upgrade button on mixing table": {
      "Anchor": "0.5 0 0.5 0",
      "Offset": "338 79.5 418 101.5",
      "Background color": "0.45 0.63 0.19 1",
      "Font size": 13
    },
    "Status panel": {
      "Anchor": "0.5 0 0.5 0",
      "Offset": "193 17 420 103",
      "Background color": "0.969 0.922 0.882 0.035",
      "Font size": 12
    }
  },
  "Features Settings": {
    "Smelting speed multiplier": true,
    "Fuel speed": false,
    "Resource output multiplier": false,
    "Charcoal multiplier": true,
    "Auto split cookables": true,
    "Auto add fuel": true
  },
  "Default Settings": {
    "Smelting speed": 1.0,
    "Fuel speed": 1.0,
    "Resource output multiplier": 1.0,
    "Charcoal multiplier": 1.0,
    "Charcoal byproduct chance(1.0 = 100%, 0.5 = 50%)": 0.5
  },
  "Mixing Table Upgrade Settings": {
    "Enable Mixing Table upgrade": true,
    "Mixing Table speed upgrade": true,
    "Mixing Table Speed in %(Max 100)": [
      {
        "Cost": 100,
        "Multiplier": 25.0
      },
      {
        "Cost": 500,
        "Multiplier": 50.0
      }
    ]
  },
  "Upgrades Settings": {
    "furnace": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "furnace.large": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "electric.furnace": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "legacyfurnace": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "campfire": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "bbq": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    },
    "small.oil.refinery": {
      "Smelting speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ],
      "Fuel speed": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Resource output multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 200,
          "Multiplier": 3.0
        }
      ],
      "Charcoal multiplier": [
        {
          "Cost": 100,
          "Multiplier": 2.0
        },
        {
          "Cost": 500,
          "Multiplier": 3.0
        }
      ]
    }
  },
  "Version": {
    "Major": 2,
    "Minor": 6,
    "Patch": 5
  }
}