So this is very strange for me. I have 3 shield devices; 2 pro versions that are connected via ethernet and 1 non-pro/tube version that is connected via wifi. The 2 pro versions cannot play DRM channels, however the non-pro/tube version CAN play DRM channels. It was been this way for some time now ...

I just started experiencing the same thing on my Shield devices. Watching DRM channels was fine up until about a few days ago, at least that’s when I noticed. I have three of them, two of which were on the upgraded to 9.2, but all have the same issue.
No issues on any iPhones or iPads, so it’s not ...