Huh?
Overflowing gas would likeliest be from the $50 nozzle on the dispenser. A lot of them have ‘Replace by’ dates stamped or molded in to them. They wear out and do malfunction.
Generally, gas spills at the filler are harmless unless someone’s stupid enough to be using fire or other sources of ignition nearby. Even if a nozzle sensor did not fail, maybe someone could be clumsy when removing the nozzle. That should not be the cause of getting gas on a part that is hot enough to ignite the gas.
Having gas overflow out of the tank is a not-uncommon occurrence, and should be taken into account in the design and design review process.
For such a common occurrence to result in such a catastrophic and massively injury-and-death possible event as a CAR FIRE - by such a clear path of cause - is engineering incompetence.