Flavio Hello!
Thus, you tested the same tracker with the Legacy and Hardware categories and changed only the server and port from the settings, is it right?
Or have you also changed the settings of the data transmission intervals, for example, or tested different trackers?
If you tested as indicated above the same trackers and changed only server and port data in the tracker settings, then could you send us at support@gps-trace.com data about this device, including the model and IMEI, as well as the time periods when you connected it as different categories? So we can check the data and try to find the problem.