For your specific question... see post #2.
But honestly, you should keep a cool head instead of just reverting to an automated flight mode if you lose track of your drone.
Just release the stick as a first step, then switch over to the DJI Fly...
The B4UFLY apps deal only with regulations. They have nothing to do with air traffic. The "OK to fly" result would not change if there was a helicopter hovering 10 feet overhead.
Little Neo for the win.
We use it at work for public safety. Since we already have an Avata 2 for entering buildings, we use the Neo for times where we may lose the drone such as entering a building post fire to assess for structural soundness...