Is Cloudflare hurting my rankings?

[BackxWoods]

I am running three websites in the same niche with similar title attributes and similar content apart from the typed articles on each site. (Mp3 Download niche) However I've noticed recently that even when I purchase a new domain, a new host, there's a slight decline in my existing websites rankings when the other website takes some authority.

I have left no foot prints, I've left almost no paper trail over then the same Cloudflare account, and I am wondering that if this could be a determining factor as to why my websites are slowly declining?

I've read some articles and posts on here which state that even running a website with the same server 10+ times if you use CloudFlare it won't cause any complications as google doesn't prioritize IP addresses, however I'm just trying to eliminate every possible problem before taking action against it.

 

[SirLouen]

If all of your sites use the same type of SSL obviously it's a footprint. But only 3 websites is not too much

What I can't understand is this statement

there's a slight decline in my existing websites rankings when the other website takes some authority.