Cold air was pouring in from the lower kitchen cabinet. I'm guessing that a big contributor could be the outside refridge vent. I may try covering that up a bit then driving some more and seeing if it helps.
Fridge outside compartment should NOT have any air leakage into interior of RV for couple of reasons
Path of CO to RV interior should propane flame not be burning correctly
Lack of proper draft across backside of fridge cooling unit....means lack of proper fridge cooling
Means fridge was NOT properly installed