As many others have posted in the past, Cloudflare often creates false blocks for IP addresses that are not blacklisted and have no issues. My ISP provides static IP addresses and a couple of months ago the typical Cloudflare erroneous blocking of my IP address started to prevent me from accessing websites who use Cloudflare without realising it doesnt work properly. My ISP were reluctant to change my static IP because there were no blacklisting issues with it and no reason for Cloudflare or anyone else to block it, but in the end I convinced them to change it and for a while it was ok.
Unfortunately, Cloudflare has now decided to block my new IP in error so I am back to the same situation. I do keep emailing all sites that i get blocked on letting them know Cloudflare doesnt work properly and they are losing customers as a result and suggesting the get their IT department to disable Cloudflare and use a more reliable service.
I realise its almost certain that all I will get by posting here is denial from Cloudflare about the failings of their product, but given how many people have raised it in the past and how common the issue is, maybe one more voice will help push Cloudflare to fix their product.