This was previously working a treat, but today on logging in I immediately got a Cloudflare page and captcha that took about 5 attempts then didn't allow me though. Managed on the second time, however.
It doesn't bypass the Cloudflare captcha, only the forum's own captcha. Whether you get a CF captcha depends on whether / how much the forum is currently being attacked and CF's idea of your IP's reputation.
There are some possible ways that I could allow bypassing the CF captcha, but they're all troublesome in various ways. Maybe I'll look into it if there are a lot of complaints about CF's captcha.