Worth noting that cloudflare does a poor job of identifying and allowing crawlers specially Google. I have a site with 1 mil URLs , nothing big and every time you turn on cloudflare it reduces the crawler to 1k visits or less per day. If you compare your logs for visits for Google and Bing with CF turned on/off there is a huge difference.

Suffice to say, that in over 5-6 projects I have added CF to, it's never worked out in my favour.