I’ve never had an issue with this. Usually when I saved the changed in the Theme Options everything updated without difficulties. After the latest theme update this started happening. I’m not sure how it is related.
So what I have to do now, every time after making changes to the custom CSS section: “Reset Fusion Caches and empty browser cache (*while cloudflare is disabled*). And I have no other caching plugin or service.
Hope this gets resolved in future updates. Slows down the workflow.