I recently received my Blade BNF vortex 150. I have about a dozen flights in and twice, it appeared to lose radio contact. It suddenly shuts down, I see the flight summary screen and it falls out of the sky. The first time it happened at about 600 ft away and the second time it happened at about 300 ft. I know they aren't supposed to have super great range but 300 ft loss of signal seems really low to me. Do I have a bad receiver?

Thank you for your help.