Per the release notes:
What's New in Version 1.15.8
- fixed hardware decoding bug
- fixed issue where the battery serial would not correctly update in the flight logs when changing the battery
- due to a bug in the DJI firmware, Focus, Track and VR with Immersive/Joystick Head Tracking modes are no longer usable with the following drone models and firmware versions: Mavic Pro (v01.03.0500), Inspire 2 (v01.0.0240) and Phantom 4 Pro (v01.03.0418). If you are using one of these firmware versions and wish to continue using the affected flight modes, either downgrade to a previous firmware version using the DJI Assistant 2 PC/Mac app or wait for DJI to release a new firmware that will fix this bug
What's New in Version 1.15.8
- fixed hardware decoding bug
- fixed issue where the battery serial would not correctly update in the flight logs when changing the battery
- due to a bug in the DJI firmware, Focus, Track and VR with Immersive/Joystick Head Tracking modes are no longer usable with the following drone models and firmware versions: Mavic Pro (v01.03.0500), Inspire 2 (v01.0.0240) and Phantom 4 Pro (v01.03.0418). If you are using one of these firmware versions and wish to continue using the affected flight modes, either downgrade to a previous firmware version using the DJI Assistant 2 PC/Mac app or wait for DJI to release a new firmware that will fix this bug