Do you have a fridge roof vent?
Have you checked to see if birds or rodents have nested in there plugging up your fridge roof ventilation? If the TC is parked so the afternoon and evening sun is hitting the side of the camper, that can cause a lot of heat around the fridge. Your gas flame may not be lined up directly under the exhaust tube where the heat is supposed to rise causing the fridge coolant to do its thing. Try to slide the plastic clip with a wire on the fridge fins down. you can also try to pull it outward but that is not ordinary. Good luck figuring things out.