I have two flight sessions, a total of 6 batteries worth of flying under my belt, and in both sessions I've lost connection on the app. Yesterday the first time ever flying it, on the last battery I finally had courage to get a bit further away, and at 700m the screen went black and got 'disconnected' ... my heart must be pretty good, because it didn't go into cardiac arrest right there on the spot. It sure found a new record for beats per second though.
I knew approximately where it was, and felt it was safe to leave it hovering there while I thought about my options, do I use RTH or what? And as I was thinking of options, it all reconnected and I came straight back. I believe THIS disconnection was caused by a message arriving on my phone, because my iPad Air 2 is on the same account, it possibly had the message arrive as well.
Today I forgot the stupid iPad was on the charger and went out to fly, and had to use my iPhone 6 as the screen. This time I put it into aeroplane mode just to be safe, and flew mostly quite well, and went out to the same place it lost connection yesterday, no problems, I started back to myself, and just as it got into clean clear line of sight, it lost connection again. I simply began bringing it home LOS and within seconds the signal was back again.
Two sessions of flying, and 2 disconnections, on 2 different devices, isn't Inspiring (pardon the pun).
Over here one of these things arrive on your door at close to $6000 and it isn't real impressive to lose your connection to that kind of money at any time. My heart managed to not explode this time, but if it keeps doing it, I'm not sure how much longer the heart will hold up.