Radio waves can't pass through water and trees are full of water.
Your control signal won't be affected by a branch or two but if you get enough foliage and timber between the controller and the drone, the signal won't get through.
What you are...
The "green dot" appears to be lens flare. There are some techniques for reducing lens flare. There are a few tutorials online and they use variations of the following:
In the Color page of DaVinci Resolve, select the clip with the lens flare...