Apparently in Helix Ultimate the H1 for the article header/title is being overwritten with "font-size: 2.25rem" in the template.css. This means that it doesn't pick-up the configuration of the H1 any longer (in my case font-size = 60px). Please help.
.article-details .article-header h1, .article-details .article-header h2 {
font-size: 2.25rem;
}
https://www.sta-toneel.nl/index.php/beschikbare-regisseurs/kale-bomen-ruisen-niet