I open a post, "Making sure you're not a bot!".
I scroll down to the comment section, it's replaced by "Making sure you're not a bot!". (This doesn't go away, no matter how long I wait.)
I open the communities dropdown, it's replaced by "Making sure you're not a bot!"

The site is nigh unusable this way :/ Is it under a bot attack? I guess I'll come back tomorrow.