Always online not working (even with page rules)

Hi
I have setup always online and page rules for spamguardapp.com homepage (https://support.cloudflare.com/hc/en-us/articles/224509547-Recommended-Page-Rules-to-Consider), but still in some cases i get 502 error but not a cached page…

For the main page itself? Always Online doesn’t scan everything, but it should at least have a copy of the main page if your site has been on Cloudflare for a while.