Hello! 

Suddenly, both the h1 and h2 title are showing on on mobile (but not on the desktop). See screenshot attached.

I've always had this css code 

.single-portfolio-holder .title h1 {
  display: none !important;
}
.single-portfolio-holder .section-title p {
  display: none !important;
}

and this seems to have worked in the past. Not sure why this is happening.

Any ideas?

Thanks!

Never mind, I simply removed the h2 content. All good now.