Google can't access CloudFlare protected websites

We use Cloudflare for a different variety of websites for extra security and load balancing, on the paid and the free subscription (depending on the website).

Since 14 september Google can’t reach (one) of the websites, it is on a paid subscription.
Because of this it stops indexing (with effects on the serp), but also stops adwords and affiliating. So this is causing some issues.

Do more people have this kind of problem recently and how to solve this?

(contact with the support dept has been made)