I read after forums on the Internet that in the drone suddenly they can turn off the engines and falls to the ground dron. Not long ago I bought Q500 4K . Until I'm it scared to fly. What is the reason for this ? Something with the software? Something with a battery? After all, with a low battery voltage, he should land the himself . Unless it's too high . There are alarms informing about low battery voltage. Too late are they turning on?