Odd issue with elements - header

Hi!

I run into really odd issue with header hero image. Everything was great and working fine until I have changed code from <h1> </h1> to <p> </p> from SEO reasons. Now on every page that had page hero element is same image (UST-2.jpg) instead of different images in different elements. What is even more strange is that deleting element does not remove hero image.

I kindly ask for your help here.