As you haven't mentioned it, I have to ask the obvious to eliminate that.
Are you getting that message out in the open in an area where the drone has a clear, unobstructed view of most of the sky?
Can you post a screenshot showing the message...
The only way that forested areas will negatively affect signal strength is if you have forest blocking the signal.
Flying over forest won't have any effect if you have a clear, unobstructed line of sight between the drone and controller.
Google doesn't provide answers and facts itself.
Search engines are a means of identifying multiple publications from multiple reliable experts and institutions. I'll trust the opinion of a group of experts (like the American Medical...
Have you seen a suggestion that they have used a different lens .... or are you guessing they did?
It's hard to see why they would change something that works well.
"Product differentiation" wouldn't be a reason to.
That reviewer said:
Usually, with a drone, you are far enough from any subjects for that not to matter but the F1.8 aperture changes that.
The first part of that sentence is correct, but the second part is an exaggeration.
It would be more...