hi! there are lots of threads on here about liners and why liners pull away from the cupcake. I've had that issue, and this is what I do to correct it...
first, I only use white Reynolds liners. they seem to be the ones that pull away the least. I bake my cupcakes at 325, not 350. I take them right out of the pans when they come out of the oven and make sure that the cupcakes aren't touching when they cool. I also put the cupcakes in cardboard boxes with the top not completely on if I need to sit them overnight before frosting.
these things have worked for me. good luck to you!
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