I just tried it and I got about 1.2km then the app locked up immediately after I got a message "aircraft disconnected". I waited about 5 minutes, climbed up the hill another 50 ft and the aircraft never reconnected. I pushed the RTH button, it beeped once - otherwise no other feedback - app still locked. Another couple of minutes I heard the drone overhead and landed it. Camera/drone never reconnected to app. I thought it was a goner. Kinda sketch and very disappointing.