Yes, it does seem like vapor lock involving the vent hose. Try this: the next time it cuts out loosen the gas cap, if that cures you it's a problem with the vent line. Possible culprits are: a pinched vent hose or stuck tip-over valve or crud in the end of the vent hose.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)