Instead of the usual parallel verticals, the Mission Planner App generates a flight path similar to this for both the Main Run and the Final Run:
This issue needs to be addressed before flying a mission. It is caused by a too short verticals radius and usually only occurs if an incorrect ‘Distance to tower' is specified, or if a tower or its antennas are very slim. To resolve this issue, first check that you have entered the correct 'Distance to tower’ as specified in our capture guide for both the Main Run and Final Run. If the zig-zag flight path persists, gradually increase the ‘Distance to tower’ setting in 0.5 m (1.5 ft) increments until the verticals become parallel.