Call Tiffin Service and register your problem; remove the remaining hubcap before you lose it as well. From what I understand, the hubcaps used do not match the Ford supplied wheels very well. Also ask Tiffin if they have a solution or a replacement cover yet.
Roger & Mary
2017 Winnebago Navion 24V (Sold)
2014 Tiffin Phaeton 36GH (Sold)