mm,
If you want to ensure you have the entire track, the simplest way is to leave the unit running for 5 minutes after you shutdown SkyDemon, then shut down your PAW. Most users, however, rarely look at their PAW tracks (or in many cases even know they exist), so it’s never been a significant issue.
In practice, you would at most lose the taxi in and shut down. After over 5 years of use and testing I’ve never personally noticed any ‘missing bit’ at the end of a flight.
Regards
Peter