Cloudflare Routing ISSUE!

I having an routing issue when Cloudflare is enable and answer to this IP: 104.20.19.162 , im testing acess tru te same broadband however forcing (in the host file inside pc) other Cloudflare IP (104.31.74.60) the site works!
how can i force Cloudflare alterate this routing? get in another ip.
Are there any WAF/ Ip rating limit/ip firewall problem that can generate this behavior?