I've been getting weekly or or more frequent notices to reset my password due to "routine security monitoring." This seems to be a known problem that can be fixed if addressed.
Please refer to this document:
Yes, I have two-factor authentication on, as well as the authentication app, and I still get password resets at least weekly. Comcast, I implore you, making customers change their password weekly (or more often) is the OPPOSITE of security. Do you really think the average customer is going to come up with a unique password twice a week?? Your own forums are filled with people asking for help with this problem. Apparently some of them are being helped, the rest are being fed the standard security tips. If this continues much longer I will have to look at other streaming options. If you haven't noticed Comcast, we have other options now.