Xbox One System Software Update in Preview Comes with Backwards Compatibility Bug Fixes
Today (26th of June 2015) Microsoft released a small update to the Xbox One system software for preview members, mainly focused on fixing issues with the newly introduced backwards compatibility feature (Please note that this will be publicly released later on in the year.).
Here are the patch notes, posted on the private preview forums by Program Manager Emily Hanson:
OS version released: xb_rel_1507.150621-2200
Available: 6:00PM PT 6/24 (2AM GMT 25/6)
Fix for an issue preventing users from Twitch Streaming Backward Compatibility titles.
Fix to address issues with Matchmaking in Backward Compatibility multi-player titles.
So this makes out good news for Twitch users who was looking to stream the 360 games!