A sudden system failure at the Hungaroring turned ordinary blue‑flag signals into a chaotic blur. While modern F1 cars display blue flags on steering‑wheel panels, the Hungarian Grand Prix saw the lights flicker randomly and without driver numbers, leaving drivers unsure of who was lapped. Esteban Ocon said the dash offered no feedback, so he could not tell when he was behind a faster car and accidentally blocked Isack Hadjar.

The confusion rippled into on‑track clashes. Carlos Sainz hit Oscar Piastri after turning a blind‑spot collision at Turn 2, and the stewards gave Sainz a five‑second penalty instead of ten, citing the faulty blue‑flag system. Lando Norris, who had taken the lead from the incident, also felt the uncertainty.

Oliver Bearman, lapped by Hadjar, complained that every lap he saw a blue flag without a number, making it impossible to recognise who was to be lapped. He received a similar five‑second penalty. FIA officials had been aware of the problem and had relied on physical flags, but the mixed signals still cost drivers.

The event highlighted how fragile on‑track safety depends on reliable flag technology.