That's interesting. Comcast might really have it out for my account then.
After your reply, I tried tuning a TVE channel for my account with a pending password reset. According to the logs, Channels attempted to authenticate 16 times over a span of ~7 minutes while the web player was hung up. This was on server version 2020.09.26.2221. Each time it fails with a "chrome auth_timed_out", shuts down the transcoder session, and tries again.
Another thought that occurred to me is that if Channels is attempting multiple login attempts for a pending password reset account, and it's doing it for every scheduled recording for Passes that are set up day in and day out, perhaps that is contributing to Comcast flagging an account for reset. And making it easier to get flagged in the future.
A new Channels option to pause all TVE-exclusive Passes after an authentication failure would cut down on the # of auth failures.