Same here
Mine was the same on my 3326 between the two roof vents, almost the whole distance was open. I had posted with pics and seal it with PL construction adhesive. I finished off by pulling all of the trim strip off both shells and cleaning and reinstalling with PL construction adhesive this lead me to a leak in the bedroom I needed to fix.
That was two years ago and no leaks since.
Question: does anyone else use C-10 flow seal for caulking the TM, it's worked very, very well for me.
Happy Camping
Bob
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