Just recently (since about March 3 2021), users have been unable to login to my phpbb site.
I went through all the motions
Restore backup, ensure cache disabled, clearing all browser cookies/cache. All extensions disabled.
I had a page rule to disable Cache (Cloudflare page rulel), and I tried a a page rule (#1) to disable Security, Performance, and Apps.
Still had the problem.
The ONLY thing that has resolved the problem is to DISABLE Cloudflare on my site. If I reenable it, the problem returns. Like clockwork.
It is as if Cloudflare is ignoring page rules. PHPBB is a dynamic platform, But do like (before this happened) to have WAF and other non cache enabled.
If I can’t resolve this, then Cloudflare may become a boat anchor as I can’t use it for anything but DNS Proxy.