The track overlay is working fine when a single clip is used, however when adding a second clip or third it will break the track overlay for all clips, until all but 1 clips are removed on the story/timeline and then the track will magically reappear. I've watched youtube videos from a year or so ago and people were dropping multiple different clips onto the storyline and the map/track overlay would be fine for each clip as they moved along. Mine just break up and start to disappear. Running 4.2.2 and Garmin Virb Ultra 30 with latest updates.
http://imgur.com/a/CCm17
http://imgur.com/a/LrIHo
Can't seem to add pictures so have linked them above.
Here's a link to an auto created video and you can see the track over lay is totally messed up due to so many clips used. All the other data is fine though.
https://www.youtube.com/watch?v=VT1WOZgMn48
thanks
Michael