Why are red flagged races restarted behind the safety car?
Why can't they just do another warm up lap and a normal restart?
There has been three different rules regarding restarts (happening after 2+ laps)
* For a long time there were two parts, with times being aggregated. This was maybe too confusing for the spectators, as two drivers may be "battling" for the lead, but the driver behind is actually five seconds ahead. Although there were kind of time trial ending to Japanese GP 1994 between Hill and Schumacher. The restart was standing with an exception of Japan 1994.
* For a few years (in F1, only used in Belgium 2001), the original race gave the starting grid, there was a standing start and the 2nd part gave the official result.
* For last few years, it has been SC start. Also within that change, the race timing system doesn't stop.
With the system in the middle, I wonder if there was a loophole to be found. A driver who had "retired" early in the race by pulling into the pits. With the race being stopped, the car gets repaired and driver lines up for the new start and possibly gets the good results while running much less laps than the others? It affects similar way to a drivers who were lapped at the time of red flag, despite not that much.