Gas spills when gas pump shuts off

I used to have that problem in GA with my Newport, but not in CA. I think the pumps are different here with vapor recovery outer hoses that seal to the fill pipe. As I understand, the pump senses the buildup of air pressure when the fuel starts rising up the fill tube. It doesn't need contact with the gas, but it does need a fairly good seal to build up the pressure.

For those too young to remember, the smaller fill openings came with unleaded gas to keep those then-new cars from using leaded gas which was cheaper, but damaged catalytic converters. That was quickly defeated by companies selling plastic funnels. Congress soon eliminated all leaded gas, and we are stuck with small nozzles and longer fill-up times.