In this case, this is probably due to some kind of tracker settings.
If the tracker sends data for the application, then after resetting the tracker settings, you probably re-configured it. That is, for a certain period of time the commands were available? This is so?
Perhaps your tracker model has such a setting as the administrator’s phone number. If it is installed, then all text commands will be accepted only from this phone number. Perhaps the situation is related to this.
Please try to check this information in accordance with the instructions for your tracker, and also check the information with the seller or manufacturer of the tracker.