Refrigerator wouldn't work on gas when leaving

After sitting for a while, or after changing propane tanks, I have to turn the stove or furnace on and get them to light, THEN the refrigerator will run on it's own. Makes sense - getting the high flow appliances furthest "downstream" in the gas line will purge all the air/non-gas out of the lines, and allow the relatively low flow fridge to get gas more quickly.