Perhaps it has been leaking all along, it just took the heavy storms to dump enough water to make it visible. I have an area in my back wall that was not there 3 weeks ago and now appears to be delaminating. I do not see a source for the leak but feel sure it is coming from the large picture window. Emailed factory with pictures and they said they would take care of it.
You now have yours at the dealer and they are working on it. I would simply make sure the work is 100% or DO NOT ACCEPT it. If possible, visit during various stages to check up on the work they are doing
