Neither my daughter nor I use Red Hots type cinnamon. We are not really candy flavor vapors. (However, if I ever find a true Good and Plenty flavor, I will happily vape that till the cows come home. I have been addicted to Good and Plenty since childhood). We both really enjoy dessert/bakery flavors, especially since she is sensitive to gluten and vaping bakery flavors at least gives her the taste of the cookies, donuts, etc., that she has to avoid.
That being said, I am very careful about ordering flavors for her that are very cinnamon forward. I check the user reviews, and if there are a lot of comments about cinnamon being the dominant flavor, I just do not order them for her. She loves it in baked goods, and we use it at home in food, but she has had problems with 3 flavors, from 3 different vendors, since we started vaping almost 4 years ago. One was a Snickerdoodle flavor, the other two were Pumpkin Pie flavors. The Snickerdoodle was very cinnamon forward - I inherited the rest of the bottle, it was very cinnamon-y - but I had no problems, so we are fairly certain it was not a bad batch. We are not sure if letting any of the three flavors steep would help - she likes to try new flavors straight out of the mailbox, and, if she likes them, she continues vaping them. She wound up with bronchitis when she was using the Snickerdoodle and one of the Pumpkin Pie eliquids. Neither of us blames the eliquids or the vendors for the bronchitis, but she was getting sick to begin with, and those particular eliquids seemed to make things worse. Since she had problems with eliquids from 3 different vendors, right now we are thinking that the problem is with the cinnamon flavoring since that seems to be the common denominator, and we are careful about what we order from any vendor. If she thinks she is having a problem she stops vaping that particular eliquid and hands it over to me. If I have no problems, we conclude that it is not the vendor's flavors but her body that is having issues with something in the eliquid.
Listen to your body. If you are having problems with a flavor, but have had no problems with other flavors from that particular vendor, then stay away from the flavor that gives you issues and enjoy the rest of that vendor's line. If you are having problems with several flavors from a particular vendor, try a different vendor who may be using a different brand of flavorings, pg or vg, or nicotine. There are a lot of variables involved here, and you have to go with what will work for you and your body.