Yes, I do. I use media grid to show my portfolio.
But even I don’t use any plugin, if I put only text for example, I have the same problem. First I get the content of the portfolio (or a big empty space if my portfolio is empty) and then the text
And also if I name my “portfolio page” folio for example and use a plugin, I have no problem, all works correctly. I have problem only if I use “Portfolio” for the name of my page!