Just got my P3P out of the box and controller battery level was 1 of 4, so I plugged the charger in. The indicator light does not progress left to right to indicate charging. It rapidly flashes the first light only. Battery for the drone charged without difficulty. Is there a controller charging error? Does the rapid flash of the first light signify an error? I cannot seem to find much in the way of problem solving controller charging errors online. Any help is appreciated.