Roku Xfinity app problem today

The xfinity app has been failing today. After you lauch the app and the first menu shows up, about a second or two later, the app disappears (crashes?) and we are back in the main Roku menu.

We have two devices and this is happening on both. I've rebooted the Roku and the cable modem and the problem persists.

Just wondering if this is a known issue. Otherwise our connection is fine and I am able to stream TV from a computer, etc.