Calculate route API Doesn't work propperly with 1 supporting point

REST APIs
#1

I’m trying to see how long a certain route will take. An example of this route would be the same as this:

A → B → A

Both in my application, as on the API Explorer, I can’t seem to make this one work.

This is 1 I made for this example:

curl -X 'POST' \
  'https://api.tomtom.com/routing/1/calculateRoute/52.50931%2C13.42936%3A52.50931%2C13.42936/json?key=*****' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "supportingPoints": [
    {
      "latitude": 52.50844,
      "longitude": 13.42859
    }
  ]
}'

This one gets the following response:

{
  "formatVersion": "0.0.12",
  "routes": [
    {
      "summary": {
        "lengthInMeters": 0,
        "travelTimeInSeconds": 0,
        "trafficDelayInSeconds": 0,
        "trafficLengthInMeters": 0,
        "departureTime": "2023-06-21T11:08:14+02:00",
        "arrivalTime": "2023-06-21T11:08:14+02:00"
      },
      "legs": [
        {
          "summary": {
            "lengthInMeters": 0,
            "travelTimeInSeconds": 0,
            "trafficDelayInSeconds": 0,
            "trafficLengthInMeters": 0,
            "departureTime": "2023-06-21T11:08:14+02:00",
            "arrivalTime": "2023-06-21T11:08:14+02:00"
          },
          "points": [
            {
              "latitude": 52.5093,
              "longitude": 13.42937
            },
            {
              "latitude": 52.5093,
              "longitude": 13.42937
            }
          ]
        }
      ],
      "sections": [
        {
          "startPointIndex": 0,
          "endPointIndex": 1,
          "sectionType": "TRAVEL_MODE",
          "travelMode": "car"
        }
      ]
    }
  ]
}

As you might understand, when I put 1 ‘supportingpoint’ in the API, it responds like thiere is none. Is there somebody here to help me out?

#2

Supporting points are used to reconstruct a route.
What you need is to use this point as a waypoint. Just put it between origin and destination.

https://api.tomtom.com/routing/1/calculateRoute/52.50931%2C13.42936%3A52.50844%2C13.42859%3A52.50931%2C13.42936/json?key=*****