Apparently nobody else has this problem because first of all the ST16s is a radio control, certainly working with Android to run DataPilot, but absolutely not a tablet used to watch movies, to run Youtube on or some other programs that have nothing to do with what is this radio remote control.
Another program has had to assign itself the Sound function of the radio and no longer has to share it with Datapilot.
It would be necessary to remove in the first place all the programs which were added on the radio-control, to redo surely a clean installation and a reset of the radio. If nothing is done, consider returning to S.A.V. or buying a new radio.