Community Forum
I just posted a message describing the issues I'm having with this feature. I'd be interested in knowing if you're experiencing similar problems.
It seems that you're having more of an issue with Robo calls getting through. Xfinity offers the Nomorobo App for free. I suggest you might want to give that a try. I have it, and I also have Hiya on my mobile phone. I feel they sort of complement each other.