error messages in header block page content

I’m using a sticky header on a page.  When validation errors occur, the height of the header increases and covers up the content on the page below.  You can’t scroll up to fix it.  I found a few others reporting similar issues (page not re-drawn after header height increases when an image loads), but none related to error messages.  The solution offered in the other threads does not apply here (Add a wrapper of fixed height to contain the image).