On many KSW-based Android 10 and 11 units, the system fails to "fire up" the sound driver after a cold boot unless a factory media or phone app is launched first. This often results in: after a cold boot.
: Originally designed for Snapdragon 625 (Android 10) units. Newer Snapdragon 662 or 680 units (Android 11+) may have these bugs fixed at the firmware level, though the tool remains a popular fallback for unstable builds. Legacy and Integration ksw sound restorer 2021
Are you experiencing on a specific Android head unit model? 10.25" Android 10 HU discussion - Page 230 - Bimmerpost On many KSW-based Android 10 and 11 units,