I've been getting the captcha request which I think only happens when I'm posting a longer message and/or using php formatting. This has been happening for months now, I forget how long, but I always copy my message before I post because if this happens and I go "back" in my browser I lose everything I typed up.
The latest happened with this post:
thread-42560...pid1338979
First you get this:
Not included in this image is this string in the footer of the page:
CloudFlare Ray ID: [string of numbers and letters] • Your IP: [my IP address] • Performance & security by CloudFlare
Then, even when you successfully complete the captcha, it kicks you to this page:
So you have to go "back" in your browser where, 9 times out of 10, it's wiped out everything you typed so if you didn't copy your post text beforehand you've got to re-type it.
On 2nd try you still get the Cloudflare screen with captcha try but it always works/successfully goes through the 2nd time.
I figured this was only happening to me and while a little inconvenient, I just learned to deal with it.