I have simple .NET endpoint that returns hard coded data (for testing).

[AllowAnonymous]
[HttpGet("IsAppointed")]
public IActionResult IsAppointed(int appUserId)
{
    try
    {
        var Obj = new { doctorId = 0, Title = "", isAppointed = false };
        _logger.Info("Is Appointed for " + appUserId);
        return GetActionResult(result);
    }
    catch (Exception ex)
    {
        _logger.Error(ex);
        return Conflict();
    }
}

If I call this endpoint using postman it takes somewhere between 150 - 500 ms to get the response. But when I call this endpoint using axios in my react-native application it takes 1 to 3 minutes.

var URL = global.API_URL + '/Users/IsAppointed?appUserId='+global.uid;
console.log({URL});

axios
  .get(URL)
  .then((response) => {
    console.log(`IsAppointed submitted`, response.data);
  })
  .catch((err) => {
    console.log(err);
  });