I have this problem with my key lime cupcakes that i make. The recipe uses buttermilk and produces the most delish light fluffy cupcake but is very moist. I think that the moisture level creates this. It doesn't happen with any other cupcake. Also, wilton wrappers are crap. When I first started baking cupcakes, I used them and they are just awful. The ones I bought didn't even fit the pan. They could be your culprit too.
I don't have any issues with my key lime cupcakes pulling apart. I'm wondering if it could be the lemon as it is in the white chocolate raspberry and lemon cupcakes. The white chocolate raspberry cupcakes are pretty moist, maybe that could be it as well.
There's a great article on cupcakes peeling here:
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There's a great article on cupcakes peeling here read that article............it's answer was: they don't know why cupcakes peel away. That isn't an answer.
I seriously believe it's the paper, not the cake. I don't know how they make the cupcake papers but you can feel the differences from brand to brand. Some are thicker than others and have a will of their own, some seem coated lightly in wax, others are super thin, etc.... Combine a waxy cupcake liner with a moist/oily cake and it peels off. Combine a dry cake in a thin cupcake liner and it's hard to peel off.
I don't think you can reach an answer until you know what the manufacturers are doing with the papers.
*Mod edited to remove website.
This is one of those very perplexing questions. I've never seen an answer that makes sense.
I agree with Stitches. That article was only helpful to the website owners who make money selling utensils they suggest may help overcome this issue. I'm a long time baker and I've never had this problem with cupcakes or muffins. Perhaps it's because I only use plain white paper muffin cups purchased from bakery/restaurant supply stores.
Or maybe it's because I only make cupcakes on a day when the sun revolves around the earth. 
I have the same issue only with Key Lime cupcakes, I purchase my liners form a restaurant supply store online. I make several flavors on a regular basis & ONLY Key Lime has issues. I an still unsure as to the cause but I would like to find a solution also.
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