It seems that Wix can't fix this problem and others:

Optimal Use of Keywords in H1 Tags

Although using targeted keywords in H1 tags on your page does not directly correlate to high rankings, it does appear to provide some slight value. It's also considered a best practice for accessibility and helps potential visitors determine your page's content, so we recommend it. Over-using keywords, however, can be perceived as keyword stuffing (a form of search engine spam) and can negatively impact rankings, so use keywords in H1 tags 2 or fewer times. To adhere to best practices in Google News and Bing News, headlines should contain the relevant keyword target and be treated with the same importance as title tags.

This is important for SEO and Content Management, I'll love to see Wix answer because I found this problem in your page and many others.

Bye.