I edited an article that has been Featured for a while and now it is no longer Featured. What happened?
Whenever an article is edited we must obtain a new quality assessment of the updated content. There is no guarantee that edits will improve your article's quality, so this new assessment may not result in high enough ratings to make it Featured.
If this happens to you, do not worry; your efforts to improve your article are not wasted. Try to consider the change in status as a learning opportunity and have another go at editing. Trying several different strategies with your edits may help you identify the most effective type of change to focus on. If you get really stuck, try posting a link to your article in the Improving Your Article Forum, where other Hubbers are happy to provide feedback and advice.