Problems with WebSockets and socket.io, no connect error 522

i have problems with WebSockets and socket.io, no connect and generating error 522, i connect direct without Cloudflare is ok and ports for connect is: https: 8443 and http: 8080.

Some way, or someone who has work with WebSockets and socket.io and connect without problems ?.

Have you already reviewed the information in this article?

https://support.cloudflare.com/hc/en-us/articles/200171906-Error-522-Connection-timed-out

Yes, the configurations is enabled, keep-alive, and a added all ip’s to white list and i verify load averages of server and this is minor to 0.50 milliseconds.