nicolamailbox

As it seems, the problem was indeed elementor. In order to solve the issue I had to change one line in the content-page-highlight.php file. The line that reads:
$content = get_the_content();
must be changed into
$content = get_the_excerpt();

Thank you! I’ll check those forums, although I’m starting to think the problem is actually Elementor. Anyway, thank you, have a good day.