The home page is the blog archive (rather than a static page)?
Have you created a custom archive for the blog using Blocks?
With the Blocks plugin active, go to Toolset > WordPress Archives and see if there is a custom archive assigned to the blog page.
Maybe you created one but changed your mind and it is blank but nevertheless assigned to the blog. In which case you can delete it, and create another one if you decide you want to customise the blog archive with Blocks.