FileHandler in OneDrive availibleOn.allowMultiSelect does not seem to work

Hello,

I am trying to develop a plugin for OneDrive and for it to work properly it needs to be able to be called with multiple files selected.

My addIn section of the Application registration manifest

"addIns": [
  {
    "id": "d0af6c7f-1cd0-4843-93fe-578801c56db5",
    "type": "FileHandler",
    "properties": [
    {
      "key": "version",
      "value": "2"
    },
    {
      "key": "fileTypeDisplayName",
      "value": "digidoc"
    },
    {
      "key": "appIcon",
      "value": "{\"svg\":null,\"png1x\":\"<censored>\",\"png1.5x\":\"<censored>\",\"png2x\":\"<censored>\"}"
    },
    {
      "key": "fileTypeIcon",
      "value": "{\"svg\":null,\"png1x\":\"<censored>\",\"png1.5x\":\"<censored>\",\"png2x\":\"<censored>\"}"
    },
    {
      "key": "actions",
      "value": "[{\"type\":\"custom\",\"url\":\"<censored>\",\"availableOn\":{\"file\":{\"extensions\":[\"*\"]},\"web\":{},\"allowMultiSelect\":true},\"displayName\":\"Sign file(s)\",\"shortDisplayName\":\"Sign\",\"icon\":{\"png1x\":\"<censored>\"}},{\"type\":\"custom\",\"url\":\"<censored>\",\"availableOn\":{\"file\":{\"extensions\":[\"*\"]},\"web\":{},\"allowMultiSelect\":true},\"displayName\":\"Send file(s) for signing\",\"shortDisplayName\":\"Send for signing\",\"icon\":{\"png1x\":\"<censored>\"}},{\"type\":\"open\",\"url\":\"<censored>\",\"availableOn\":{\"file\":{\"extensions\":[\".asice\"]},\"web\":{}}}]"
    }
    ]
  }
]

My problem is that while custom actions have allowMultiSelect set to true in OneDrive environment I can not select more than 1 file and call my plugin out.

One file selected custom FileHandler actions are present

Multiple files selected custom FileHandler actions are nowhere to be found

With that I have a question, how can I select multiple files and call out my plugin?

I am facing also a problem where custom actions appear with plugin name, but as this already was reported (

) I will not talk a lot about that in this post.