I've been having an issue with my Air 2 for quite a while and wanted to get some feedback on what might be causing it. More often than not, I'm getting a proximity warning (audible and on-screen) that sometimes prevents the drone from flying backwards. Big bummer if I'm filming a reverse dolly! I've tried cleaning the sensors, but that doesn't seem to help at all. I *think* that the sun might somehow be interfering, but that's inconclusive. Help?