I've got a 2019 337RLS with a Dometic refrigerator. The clear plastic door shelves don't slide into the tabs that are part of the door. I've got one shelf that does slide and remains secure, but the others always fall out whenever we move. I've pulled the shelf that is secure and compared it with the others and they look identical with the only difference being that the corners are slightly bent in on the one that fits. I've trying bending the shelves while sliding them into place without any luck. I'm just wondering if others have had this issue and/or is there some trick.