While traveling, I have been running my fridges on propane since 1972 in several different TCs.
Could be a CYA thing for the manufacture. It is conceivable the lit fridge could ignite gasoline when you are at a gas station. I am not aware of it ever happening, but possible. If I had that concern, I would simply turn the fridge off when traveling. With the door closed, the fridge will stay cold for a couple of days.
If the fridge flame went out, the igniter would relight it.
Lots of folks are concerned about turning the engine off when refueling. I have never seen a problem, and when you are fueling cars are typically all around you with the engine running.
