I had this problem with my last car and I’m certainly going to explain it poorly but here goes.
There’s a vent or pipe of sorts in or around where the fuel goes into your car and if it gets clogged vapors build up and cause the shutoff mechanism in the handle to trigger prematurely. Cleaning it out can help.
Why does the gas pump sometimes pump super slow?
Some times the pump is like if it was slowly letting out just a little dribble. What's up with that?