I think I've seen something like this when loading [all] in a thread but I don't think it's normal for just connecting to the forum (unless it was just after hitting post).
It was when I was trying to load all posts of a particular post.
If you manually disable JavaScript for security/privacy reason, you definitely need to enable it when CloudFlare perform check. After that check, you can disable JavaScript and continue use BitcoinTalk (until the check triggered again).
I actually did few days ago for some reason that I can not remember but I never thought this was the effect here LOL