This has been going on for several weeks and I haven't put much effort into questioning it, but I have a few minutes and thought I would throw this out. I run both the regular DVR app and the beta app on my Firesticks/FireCube...often, the main app will not tune a channel, when selected from the guide, but I can switch to the beta and it doesn't seem to have that issue. The channels cover all variety of channels...OTA HDHR, 4k HDHR, Prime HDHR and TVE channels.
Is this a known issue?
I just try to live in the beta app, so not a big deal.