My P4Pro started up in its box by itself. Luckily I happened to come into the room and heard it beeping away so could turn it off but by then it was very warm, gimbal guard still on. Has anyone had this problem? Very strange. I have had this P4Pro since buying new in 2018 and it has never done this before. The battery is not original but is a 'new' one from DJI not some cheap knockoff.