Starting at 2:00 p.m. PST today, members of the Xbox One Preview Alpha Ring will begin receiving the latest 1908 Xbox One system update (Build: 19H1_RELEASE_XBOX_DEV_1908\18362.6039.190716-1920).

DETAILS:
  • OS version released: 19H1_RELEASE_XBOX_DEV_1908\18362.6039.190716-1920
  • Available: 2:00PM PDT 7/19/19
  • Mandatory Date/Time: 3:00 AM PDT 7/20/19

Fixes:

System
  • Various stability fixes to the system.

Known Issues:

Audio
  • Users who have Dolby Atmos enabled and console display settings set to 120hz with 36 bits per pixel (12-bit) are experiencing loss of Dolby Atmos audio in some situations.
    • Workaround: Disable 120hz or set Video Fidelity to 30 bits per pixel (10-bit) or lower.

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


Source: July 18th : New Preview Alpha Ring 1908 Update (1908.190716-1920) - Xbox Wire