When my app returned from the background, it couldn’t play any audio. It is not just mute. I checked the AudioSource.timeSamples，it not changed at all.
Default Volume Camera WindowConfig and Volume Camera have the same settings: Unbounded
App Mode is set as “Mixed Reality - Volume or Immersive Space”
Development environment：
UnityEditor 2022.3.21f
PolySpatial 1.2.3