Transfer of owner of files got not to be able to be used with batch requests of Drive API

At 15, June 2020, I have reported the transfer of owner of files got to be able to be achieved with batch requests of Drive API. Ref And also, yesterday (06, July 2020), I could have confirmed that this could be worked. But, now (07, July 2020), the following response is returned.

{
  "error": {
    "errors": [
      {
        "domain": "global",
        "reason": "invalidSharingRequest",
        "message": "Bad Request. User message: \"You can't yet change the owner of this item. (We're working on it.)\""
      }
    ],
    "code": 400,
    "message": "Bad Request. User message: \"You can't yet change the owner of this item. (We're working on it.)\""
  }
}

I hope this situation is resolved in the near future.

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