Sim Update 4 pre-release test build v1.6.22.0 is now available for all players enrolled in the public beta. You can read the release notes here:

Known Issue

• Airport arrival and departures on the World Map are listed in random order instead of by arrival/departure time

General Bug Fixes

• Fixed parsing of SimVar units when loading an electrical system
• Fixed Exit Aircraft prompt appearing when not in World Photographer activities

Glass Cockpits

IIDS (integrated instrument display system)

• Fixed IIDS pressure always in the caution area.

Missions

Familiarization Flight

• Fixed instructor missing on reward screen

Flightseeing

• Fixed POI markers not displayed

Info here