A few stories from a feed will not disappear. They have been read for a long time and even trying to mark as unread, then again read, does not remove them. I also removed the feed, then added it again and an additional story ended up popping up. Meaning in my feed there are two stories that will not go away. One web and Android version.
Here is the feed:
https://www.polygon.com/rss/index.xml
Thank you for you help.