Unless disabled, it'll also use extrapolated paths when a plane exits FR24's coverage area. It's called "Estimations", and is in the Visibility tab of Settings

Unless disabled, it'll also use extrapolated paths when a plane exits FR24's coverage area. It's called "Estimations", and is in the Visibility tab of Settings. By default it will show up to 4 hours of estimated positions. I can't say whether that's what was shown for this flight or not, as it won't show historical data for SPAR19.