I was doing my fifth flight of the day and then DD began to work in an odd way. The Drone (P4P) climbed up to 2 m and then stayed still. I made the same procedure many times, changing the batteries, turning off and on all the devices, and nothing changed, even was worst, two or three times, after sending the UP instruction the engines did not turn on.
I the last try I let the drone 2 minutes at 2 m, an then I grab it to turn it off, as soon as I grabbed the drone pulled up, and began the flight, finishing it, without any other problem.
I had that situation, the drone still at 2 meters, two or three times, but just few seconds. This time was permanent, and the situation of not turning on the engines, is the first time that happens to me.