Keep getting logged out of Xfinity stream

I've been trying to watch TV tonight through Xfinity Stream in my web browser. I log in, start watching a show, and about 5 minutes later, the page refreshes and logs me out—even though I selected “Keep me signed in” at login.

When I try to log back in, I get the error message:
“The Xfinity ID you entered was incorrect. Please try again.”

I'm using the exact same credentials I was just logged in with.

This happens on both:

• Chrome Version 136.0.7103.114

• Firefox Version 138.0.4 (64-bit)

In Chrome, I cleared my history and cache. Firefox was just freshly installed. The issue happens regardless. I’ve also disabled uBlock Origin for Xfinity.com in case it was interfering.

Given this, I don’t believe the issue is on my end—it seems like a session or authentication issue on Xfinity’s side. It's frustrating to get kicked out every 5–10 minutes and then be locked out entirely by a bad login error.

Also, if I can log in and post here on the forums, that clearly means my credentials are valid.

Can someone from Xfinity please look into this? I’d appreciate any help or a confirmation that this is being investigated.