There are more issues than what you have experienced.
I haven't the time to play jpg checkers getting a photo on this site.
Please be aware that the small bead of caulking will separate between the outer black strip that runs across each side of the entire trailer and the side wall.
There is a more robust bead on the front side of the strip where it adheres to the front and back sides of the trailer.
Check all your caulking at the side markers, outside shower and water heater, etc.
An ounce of prevention........
I've had to replace one of the black strips that runs across the inside of the black channels the screws run through holding on the roof as well. .08 cents per inch, but the shipping with kill you.
2 year old r-pod 171. Other than that, it's perfect.