I have a surface go 8GB version.I use a mini 6 port usb C hub with an external 90 watt usb c charger. How come I keep getting this device may need more power message, I also have the MS power adapter for the laptop plugged in too, the mini hub has power delivery labeled on it's aux c input port. Also why do I keep getting a yellow exclamation mark on the battery indicator saying you are fully charged, am I supposed to disconnect the external MS adaptor?