Xbox one updated to 184.108.40.206 today -- more issues
In addition to the known issue "Stop button on Xbox Media Remotes sometimes unresponsive during video playback." the pause and play buttons (on remote control) do not work at all during playback. They worked in the previous version, and they work in all other video apps on the xbox one.
Also the fast forward and rewind commands are still broken. They only skip ahead 30s or back 10s now. In the version prior to the last one they actually worked and had multiple speeds from 2x up to 128x.