We just lost 2 drones, both Phantom 4 Pro yesterday and this morning. When our team fly the first drone yesterday, it lost the signal when the drone is climbing the altitude at around 85 meter. The remote control and iPad both crashed, and restarted. The remote never connect to drone anymore (red light) (tried everything to try to connect to drone - restart, unplugged ipad). The drone continues its mission and never return. Deploy a group of people to find it but couldn't find it. This morning we use another drone to find the first drone, using the same mission but at lower altitude. Thought we can use the image captured to find the first one, but, the same thing happened again. The drone gone haywire and never return again.
I know there are a lot of missing information in this topic as I am not the one who fly the drone too. I will be updating the topic when the team returned.
All the drones, ipad, cables and batteries are brand new. Conducted 7 mission without problem before the first drone gone rogue. Then followed by the second drone.