Starting at 2:00 p.m. PDT today, members of the Xbox One Preview Beta will begin receiving a new 1902 Xbox One system update (181211-1920). The 1902 build is a new release of the recovery building upon the latest 1811 build plus new bug fixes. Read on for more about the fixes and known issues in the latest 1902 system update.

Fixes:

 

General

  • General console performance enhancements and fixes

 

Known Issues:

 

Cortana

  • We are tracking an issue where Cortana sometimes does not respond to commands

Audio

  • We are tracking audio issues in which some games have audio that cuts in and out
  • Audio settings reverting to a previous settings after taking an update. Workaround is to please turn on your Audio Receiver prior to turning your Xbox One and the settings will not revert.

 Profile Color

  • Sometimes users may encounter the incorrect Profile color when powering on the console.

See the rest of the story on Xbox Wire

Related:
Operation Absolute Zero Brings a New Kind of Cold War to Black Ops 4
New Preview Alpha Update – 12/19/2018
New Preview Alpha Skip Ahead Update – 12/19/2018

Source: Xbox Blog