Does the Mavic just stop and hover when a possible collision is detected or does it adjust in realtime and maneuver around the object?

I'm curious because I'm going to use this mainly in biking trails to follow me in between large trees and I'm afraid that the Mavic will just stop and hover and I'm like several hundred meters away already.

It would do both, the same way as the Phantom 4.

https://player.vimeo.com/video/184147824
The video above shows that in only hovers and the guy had to go back to AvtiveTrack mode again for the Mavic to follow him.