I build website with Neue Haas Grotesk font (https://fonts.adobe.com/fonts/neue-haas-grotesk) and I spot the issue with X letter on my page (can't share link it's local server). Here is CSS code, and final result. Each X or x letter is converted to default browser font wchich is Times New Roman. Where can be problem?
Same font usen in Adobe Xd works perfect.
OK, solved. It was necessary to check also ENGLISH language support. It strange, because in my language X also exists.