If a high amount of traffic is being blocked you got 1 cause! Your sensitivity level is too high (and it might be blocking ligament traffic from reaching your website)! Your best bet is to try lowering the sensitivity to medium (so you have don’t block actual, ligament connections to your site, while still blocking dangerous connections)
Yes, Cloudflare will block any suspicious IP’S (like those sending repeated HTTPS requests that is, with rate-limiting enabled). Just know that it doesn’t just block connections because they are sending repeated HTTPS requests! That’s just 1 example!
No, status 200 indicates an “OK” response, not a “Connection Close” or “Connection Closed” response. However, this might be occurring if the client’s browser sends the request but never completes it (like they lose internet or close out the tab). If I may ask what percentage of traffic is giving a “Connection Close” or “Connection Closed” response with HTTP response code 200?