Either way, NO, it's not right for flames to be coming out of the burner chamber. Big fire hazard!
A blocked burner vent (chimney) from wasps or debris, is most likely. You'll have to clean it out, thoroughly.
Usually the burner flame will create enough draft by itself, once it lights. It should only "blossom" when it first lights. It might backdraft with the wind, and cabin doors open, but all the covers need to be in place anyway.