Persistant app data appPrivateFiles not working

I am currently on ctrlx OS versions 2.02, and have set up package assets for persistent data. Here is my package-manefest.

{
  "id": "rexroth-activemover",
  "title": "ActiveMover",
  "version": "3.0.47.1",
  "configuration": {
    "appPrivateFiles": [
      "^activemover-firmware/"
    ],
    "appDirectories": [
        {
            "name": "activemover",
            "description": "ActiveMover configuration",
            "icon": "bosch-ic-components",
            "copyOnLoad": true
        },
        {
            "name": "activemover-firmware",
            "description": "ActiveMover firmware",
            "icon": "bosch-ic-components",
            "copyOnLoad": true
        }
    ]
  }
}

 The activemover and activemover-firmware directories are present, and files are copied over once the snap is installed. However, on a backup, the appPrivateFiles does not seem to be applied and files in activemover-firmware are backed up/loaded on a restore, which we do not want to happen. Is there something I am missing?