Cloudflare causes WordPress Site Health main page to continually refresh. For those using Cloudflare free you may not have enough Page Rules to put a stop to this behavior. I was a long time Pro account until recently when I could no longer afford service. So I can not input a Page Rule to stop Site Health page from being cached. I am assuming this is what causes the constant refresh. Which makes that page useless.
Update have put a hopeful fix in place by editing previous Page Rules. Currently doesn’t seem to have fixed this annoying problem.