New blog posts disappearing...until I go fwd then back?

Hi all, not a developer so I might be explaining this wrong:
whenever I make new blog posts (like the most recent ones), they wont appear on the main page anymore. If I go to another page then click back onto the main page, then they show up. So the posts are there, just not loading properly on the first try. Almost like they’re hidden.

Where would i go to fix this error, the Content Model page?