That seems to have fixed the problem. The site-health is loading and displaying wp-fail2ban items correctly. Thanks!
BTW: Is it possible to disable the recommendations for Blocklist / Contactform /… Addons?
Thanks for the quick response! 
That seems to have fixed the problem. The site-health is loading and displaying wp-fail2ban items correctly. Thanks!
BTW: Is it possible to disable the recommendations for Blocklist / Contactform /… Addons?
Thanks for the quick response!