ヒントはこれだよクンニリンサン！
さあとっとと治したまへｗ

Blocking Cloudflare requests is the most common cause of intermittent 522 errors.
When traffic flows through a Cloudflare-enabled website, the origin web server sees all requests as coming from a handful of Cloudflare IP addresses.
This can often trigger firewalls and IP rate-limiters to block Cloudflare requests,
thinking that the website is under attack. CPHulk (which comes with cPanel) and other services have been known to do this.
To avoid this situation, make sure that:
　
Cloudflare IPs are not being blocked in .htaccess, iptables, or your firewall.
Your hosting provider isn't rate limiting or blocking requests from Cloudflare IPs. Ask the host to whitelist the Cloudflare IP addresses .
　
In addition, your host provider might wish to disable the rate limiter.
　
Apacheを使ってるだろうｗ？
Apacheの設定を治すだけだ