I’ve always wondered why peppermints get all holey when you suck on them. No other candy does that. “Maybe there’s an ingredient that dissolves faster than the rest,” I predicted. Nope, the answer is more obvious / boring than that. Air Pockets.
Someone in this forum decided to dissect one to see if he could see evidence of air bubbles. I did the same, and found that they aren’t so much bubbles, but more like long tubes of air that seem to be the result of stretching the candy before it’s sliced.