Does not work in wordpress 5.5 (thumbnails)

After updating wordpress, I encountered a very strange problem. The site has mixed previews of articles. The article has one image, and on the main page (and in the categories) this article has a thumbnail from another article. This happened with all the articles on the site (more than 90,000 articles). I couldn’t figure out what the problem was for a long time, but deleting the plugin fixed this problem on both my sites.