This issue has been going on for a while now and has since gotten worse. The charging port works for all chargers. However, when I try to use the Samsung usb-c headphones or a dongle so I can use an aux cord, it does not work. When the headphones are plugged in, the notification bar will rapidly switch between saying, "USB connected" to "USB disconnected". When the dongle is connected, no message will display. Any tips?