I lost my Phantom 3 Professional today in the strangest way. I took off in P mode and was flying around over the lake at 30-40m up - following a friend who was riding a Sea Doo. Out of the blue, I received a GPS warning briefly. The warning went away before I could take any action, but I started hearing back - and the. I got the message again and flipped into "A" mode. About 10 seconds later, I got the connection lost message and had lost site of it. I assume it dove straight down into the water but I have no idea why. I was definitely switched over into "A" mode, and in a safe area out over the lake a good 5 or 10 seconds before I lost connection. By the time I got on the Sea Doo and over to the last location that had been updated on the map, there was no sign of it. (Do these things float at all? Even briefly?) Replaying my flight log, the very last entry on it shows an altitude of 20m and a vertical speed of -10m/s. I haven't been able to pull the log and upload to HealthyDrones yet since I'm not at home. I need a root cause analysis of this thing. If I did something to cause this, that's fine. Is there any kind of defect that we might find that would make this DJI's fault and compel them to replace it? If it's not my fault and if DJI won't fix it - I don't know what to do going forward. I'm not going to buy a replacement if this is just a scenario that can happen randomly without warning.... But if I clearly did something wrong and can learn from it, I'll order another one immediately. I should be able to send the link to the HealthyDrones report before midnight. Until then - are there any guess as to what MIGHT have gone wrong???