I've found it's a combination of 3 things. 1.) The type of gas pump. (Some do this more than others). 2.) The depth you place the nozzle in the tank. Along with supporting it, so the end of it is not up against the side of the filler neck. 3.) The speed at which you pump.
I fill up at one station near my home because for whatever reason, they are by far the cheapest. (ARCO AM-PM). There are 4 pumps I avoid there, because for whatever reason, they will "kick out" with far more frequency than the others. One of these pumps is so bad it makes filling up a nearly impossible task. When I spoke to the attendant about it, he said I was the only one who has complained. I believe him because my truck fuels up just fine at that pump.
When I fill I insert the nozzle as far in as it will go without forcing it. I then deliver the fuel very slowly.
I can usually guess just about how much it's going to take. And when I get near that, I slow down the fill rate even more. I never
set the pump for auto fill. By controlling the delivery manually, I can immediately stop it if it backs up without kicking out. It has done that from time to time. Again, this is more because of the pump, than it is the vehicle.
I have never had to dick around filling up a vehicle the way I do this new Jeep. Most all of this can be traced back to the stupid "capless fill system", not the gas station. For example, my 1991 Ford F-150 has 2 tanks that hold a total of 38 gallons when both are dry. I can fill both of them
faster than I can fill my Jeep with 20 gallons or less into one tank. Yet another "better idea" from an "inventor" who should be stood up against a wall and shot.