The Steam Client Beta has been updated with the following changes:
Big Picture
- Fixed an issue with the "use the gamepadui overlay when a controller is connected" mode where desktopUI chat windows could open and block the Big Picture overlay.
- Fixed the instant clip shortcut not working for non-Steam games when using a gamepad.
- Fixed games failing to start when when some custom launch options are specified.
- Fixed client startup loop that could occur in rare circumstance when Steam config directory is in an unexpected state.
Source: https://store.steampowered.com/news/gro ... 1835474838