I don't know if anyone has considered this about flying over water.
Water is reflective.
Radio signals are, essentially, light.
So, it kind of makes sense that a radio device that relies on super critical radio waves, might get confused on...
And you've examined the data from all those incidents?
The idea that reflections from water cause drones to sink is not supported by flight data despite the number of times people like to repeat what they've heard.
All my flying is over water.
was the engine off? Could there have been some electo-magnetic interference? that's all I can think of... Either that or somebody has a voodoo doll cranked up?