I've had similar problems on my site a time or two. Perhaps you can use the Ezoic Chrome Extension to remove the placeholder that is below your title and insert one where you want it after the table of contents. I see the one in your screenshot is under_second_paragraph. Is there where you originally inserted that placeholder?
Also, if you are using a plugin like Ad Inserter to place your ads, be sure the settings are correct for that particular placeholder. That has caused me problems a time or two.