Ron, if that bubble is only 1 in. from the edge, that would concern me a little. If it makes it to the edge and the wind can get a hold of it, I think it could lift it right off.
Have you taken pictures and informed your dealer plus CR? You will have it documented that way.
My roof has a couple bubbles but they have been there since new and haven't changed.
When the trailer was new, there was a part of the roof on the slide out that was showing signs of a problem. When I had it in for some warranty work I mentioned it and they put some glue in there and sealed it back down.
2008 Cruiser CF26RK
2013 Ford Eco-Boost
Heavy duty payload - Max tow