by the way your plug in really bugs when you change theme option, some values reset and it takes a lot of patience to have what you want
Does this happen on the back-end preview window or on the front-end of the site? If the front-end, then it is the site/page/style/asset/cdn/browser cache. Unfortunately there is nothing we can do about those. In similar cases I usually recommend turning off the cache while the styling set up, and then clearing and re-enabling it.