I own a 2017 32DS, on my last trip I ended up with waves, not bubbles, in my roof. When I got home I inspected the roof and thankfully there were no tears in the membrane. I took it to our locale RV repair shop and when the job was done they informed me:
When we removed the transition strip between the front cap and the roof, the membrane was not even tucked up under the front cap the way it is supposed to be.
So they pulled the membrane forward and tucked it up under the front cap and resealed the whole thing.
They did a great job.
So everyone check your seals at the area between the front cap and transition strip.