What happened: A recent software issue that caused F1 cars to slow down echoes Nigel Mansell's final-lap retirement at the 1991 Montreal race. Former engineers Patrick Head and Paddy Lowe recount the technical failure that stopped Mansell's car.

Why it matters: The history illustrates that electronic glitches have affected the sport for decades. Mansell's late retirement remains a defining example of a system error costing a driver a victory.

What to watch: Formula 1 continues to address modern software reliability following the latest formation lap incident.