Does anyone else view Twitch on their Android TV device? I'm using a shield and I'm having a consistent issue with it not starting streams from where I stopped watching it last, weirdly if I watch the stream on my shield and then switch to my Windows laptop it does work.
The Twitch app has been abandoned on Android TV. It hasn't been updated in a very long time.
You should use this app instead. It's being actively developed and is much better than the official app. It should solve all your problems.