At least twice in the last week or so, when using the Channels DVR app on my Amazon Fire TV Stick 4K, the app GUI will "hang" or "freeze". It doesn't happen during playback, but shortly after. When I'm getting out of the video and starting to navigate the menu to the left of the screen (eg. going from the DVR section to the Guide section). The app just plain stops responding. I can hit the Home button on the Fire Stick remote, and I can get back to the Fire Stick's home menu, launch other apps, etc. but when I come back to the Channels DVR app it's still hung and the only way to fix it is to power-cycle the Fire Stick.
Any ideas how I might help with debugging this problem?