RSS Feed not up to date

I have a blog at https://www.cominneapolis.org/blog i have been using the feedburner plugin to burn a feed to https://feeds2.feedburner.com/CampusOutreachMinneapolisBlog My last 4 posts to the blog have not been updating to the RSS feed. It has worked fine for the past couple of years, but just randomly stopped working earlier this month. My feed is validated using the feedvalidator.org and my feedburner account says there are no errors. It seems like it is a problem with wordpress communicating with feedburner, but i dont know. Any help would be appreciated.