New travel trailer delivered with bubble along the edges

Back in 2005 when I bought my trailer there were a few large bubbles under the roof membrane. When I mentioned it, the sales guy pointed across the lot at all the other trailers with bubbles in the roof. I bought the trailer and after a few years the bubbles were all gone.

That being said yes mine with a TPO roof still has a bubble more like a loose area down each side of the roof just before the membrane wraps down over the edge. Personally if other trailers on the lot have the same bubbles I would say go for it.