Community Forum
Their Advanced Security feature has recently been pushed to their gateway devices via a firmware update whether you want it or not, hence the hypochondriac notices. It's buggy.
We've seen many many posts about this here lately ! The work-around is to disable the Advanced Security and not use it for now, it's buggy.;
https://www.xfinity.com/support/articles/using-xfinity-xfi-advanced-security