Problem with Yoast etc placement

Hi I’m having problems with post pages where the sections for Yoast and other plugins are showing in the middle of the page, block some of the content and won’t move. I’ve tried deactivating the Gutenberg plugin and the problem goes away but comes back when I reactivate it. Any ideas what to do? Site is up to date and all plugins are updated. Everything looks okay when viewing the post, problems are just when editing it.