I am in the UK and have been getting Cloudflare blocking for over a year when using a VPN. One military archive site in the US in particular which I access for research almost daily will now block my PC if the VPN is on. Switching it off gives access but switching it on again whilst connected results in another block. The archive site wants to 'see' a UK server. More frustrating is a local bus company website also blocks with Cloudflare if VPN is on yet another bus company does not.