When we close the refrigerator door the freezer door pops open. It seems like a vacum problem?

My new freezer did the same thing. I contacted the company and they went into the whole leveling thing. What it has to do with is the magnetic seal. The magnets are not strong enough to keep the freezer door from popping open when closing the big fridge door. They share the same duct. I level my doors on the fridge and freezer so they swing shut by themselves after opening. Just the force of the big door when it swung closed cracked open the freezer door about a quarter of an inch and if left unnoticed created a puddle and made the fridge run overtime. I solved the problem by placing strong magnets inside the fold of the magnetic seal at the handle end of the door. This is the flap on the outside the door seal. I used six magnets on the top and six on the bottom. The magnets were from discarded Sonicare tooth brush heads. They are very flat and super strong. You can find something on ebay. My freezer door doesn't budge problem solved. I did call the company and told them I solved the problem and they still insisted it was the leveling. Good luck, Art Knapp