Reset the Bluetooth headset to factory reset and then re-pair the connection:
Factory Reset Method 1: Most Bluetooth headset manufacturers use a uniform processing method during production: press and hold the “Power Switch” and “Volume +” buttons for 15 seconds without letting go.
Factory reset method 2: First turn on the Bluetooth headset (do not need to enter the code status), then charge the headset for 5-10 seconds. If most Bluetooth headsets are charged in the power on state, the headset will automatically shut down and the machine will be forced to recover. It is the factory state