I tried to make the copter following me (QGC) 10 meters behind…
After switching from Loiter to Follow the copter flew behind me pointing at me. Then I moved away and the copter stayed at his position not moving at all.
Positions seemed to be send from QGC.
ArduCopter 4.0.1
Matek F405-CTR
QGC android daily 2020-02-07