The new captcha was just rolled out there.
There seems to be no issues with it, but there is no need in "I'm a Human Being" button. If you click it without doing anything else, it will lead to an error:
(which is understandable - I didn't solve any captcha)
If you click the checkbox and pass the verification, this button is automatically greyed out and shows black dots; in a second captcha is gone.
(Similar behaviour will be if it asks you for text: once you solve it and click "verify", captcha is gone, no need in "I'm a Human Being" button)
So I feel that this button should be removed.