Hans H

I can confirm that even with jsonrpc: "2.0"included in each request in a batch, the server responds an invalid request.
Example request:

[
  {
    jsonrpc: "2.0",
    method: "minecraft:server/status",
    id: 1
  },
  {
    jsonrpc: "2.0",
    method: "minecraft:players",
    id: 2
  }
]

Response:

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32600,
    "message": "Invalid Request"
  }
}