Not sure on you model, but now I have had 3 brand new pop ups and each one has voids or holes where the canvas attaches in spots. Even my new camper does but you can push the canvas together to make the spots smaller or just stick paper towel to fill them in.
Usually the spots are so small, bugs usually don't get in there, and more come in every time you open the door.
But my wife is allergic to bees and wasps and yellow jackets love to find holes to come in, so I make sure canvas attachment voids are very very small.
You really need to take some pics so we actually know what you're talking about.
Good luck