Gas spills when gas pump shuts off

I tried listening but they have the sealing boot on the hose that makes it hard to hear. I'll try holding it back and not sealing the boot on the pipe. I've been taking 5 gallon cans to the station in the truck filling them up and using those to filll the GTS Dart.

One attendent came out while I was filling and I mentioned my problem. He was nice, got a rag and held it on the car under the filler tube while I was filling her up.