Instead of a normal Recaptcha you get sent an image with that text on it. SER itself does no analysis of images and sends it to CB. CB however knows this type and will skip it immediantly.
The question is why do you get such image instead of a normal one?
Answer is, you answered too many re-captcha captchas wrong. That IP or proxy IP first gets a difficult to read captcha, after some fails it gives you an even more difficult one (blobby captcha) and in the end it gives you this final one. Maybe there is a nother step not to reply at all, haven't checked it.
The only way to get around it is you getting new proxies or proxies at all. You need to do the requests with an IP that is not on there blacklist.