There was no sun, it was completely cloudy. Every single explanation to this just scares me out that the drone can do weird stuff and crash into things and it is uncontrollable :/angle of the sun can cause sensors to do strange things. A bead of water and the sun in a low position is a possible cause of an engine fire warning in some aircraft that I have flown. It's just something mentioned in the factory ground schools..they don't offer a suggestion what to do with your drawers.