This is the third flight this has happened: It flies well but after 5 minutes or so I lose lift. It acts as if it doesn't have the power to lift itself. The last 2 flights resulted in crashes today but not bad ones as I have been lucky to keep it close to the ground except the last crash it seemed to really lose control and go down sideways. (but I will have to fly it again to see if I can recreate that). Both batteries are OEM with about 10-15 charges each. This has happened with as much as 70% charge and as little as as 30%. It is controllable as long as I can maintain lift but it wants to bounce off the ground which is getting dangerous. Any ideas?