Searching our knowledge base for the answer...

Request: Cloudflare Proxy Support

Feature Request|We are collecting votes for this issue
Currently, Wix does not support proxied DNS records for domain connections. With Cloudflare, DNS records are proxied by default.
Wix uses a CDN (Content Delivery Network) server, which is an interconnected system of cache servers in different geographical locations. Web content is delivered from the closest cache server, allowing your site to load faster.
When a visitor reaches any page of your site, the entire site loads at once. This allows your visitors to move seamlessly from page to page, without experiencing additional loading time. 
Tip:
As a workaround, you can ask Cloudflare to disable any active proxies or record masking for your domain. Learn more about verifying your Cloudflare settings when connecting your domain to Wix
We are always working to update and improve our products, and your feedback is greatly appreciated.
  翻译: