Add a bleeding resistor to discharge residual voltage or current.
By default, the current flows from the AUX_IN pin to the AUX_IN_COMMON pin (when connected to a sourcing device) or from the AUX_IN_COMMON pin to the AUX_IN pin (when connected to a sinking device). In some cases, the amount of current going through the sensing circuit is insufficient for the connected output device to match its minimum current requirement when the device is in an on or off-state, depending on the configuration of the circuit. Connect a 2.2 kOhm external bleeder resistor to boost the flowing current between the AUX_IN and AUX_IN_COMMON pins.