Other Fuel System Tank Filling/charging problems of the 2018 Toyota Highlander

When filling the vehicle with gas, after the gas pump shuts off, gas comes surging back out off the filler neck with enough force to splash on whomever is filling the vehicle. This happens at multiple gas stations and different pumps with different flow rates. Each time, the handle is either being held by hand or by latch on pump handle. When the tank is full, pump shuts off and gasoline has ceased to flow from the nozzle, the gasoline then immediately surges back out of the vehicle. There is enough gas that comes back out to make a puddle on the ground. Dealer diagnosed and replaced a faulty vent valve. After two months the problem is happening again. Have provided video evidence to the dealer. Dealer refuses to escalate or recognize it as a safety concern. Refuses to provide loaner vehicle while vehicle is diagnosed and repaired. Due to the nature of this safety issue and high probability of contamination from gasoline and environmental concerns compounded by the recurrent nature of this issue, I feel this needs to be elevated expediently.