Yes, I use the Older Garmin setting when using my GPS 12MAP. I have a track in my GPS right now that's getting cut off. I'd be willing to run the debug version.
I just watched the download again and, in this case, it starts downloading the first part of the track (I see the red line on the map), then it erases the line, then it starts a new line where it left off and continues to the end of the track.