Question about Samsung USB-C audio adapter

The tiny contacts and the plug mechanism of the USB plug are overstressed by the movements of a headphone cable and cause loose contacts after a few months. I had 2 of these adapters. Both produced the symptoms you describe after less than a year. The slot on the smartphone also suffered. Remedy: Bluetooth headphones, or an adapter that does not transfer the mechanical stress on the plug to the USB socket. I haven't found one yet.