Page headers run off the slide after publishing

This problem comes and goes, but it's back with a vengeance for me lately.  I will create a slide, or a quiz question, it looks fine.  Then I publish it, and the header is no longer wrapping, it runs right off of the slide.  If I go back into the presentation in Storyline, sure enough, the header is running off of the page now.  Can anyone help me out with this?  I used to think it was imported slides only, but it just happened with a quiz I made...every quiz slide, the question is now a single line, running off of the slide.