Fixed issue ARFB-271 where `SimulationPlaneSubsystem` could throw a `NullReferenceException` when `ArSession.Reset` is called.
Fixed an issue in `SimulationMeshingProvider` where mesh data updates were not properly marked as no longer dirty. This caused the subsystem to unnecessarily update meshes every frame.
Fixed issue where `SimulationPlaneSubsystem` could throw a `NullReferenceException` when `XRPlaneSubsystem.GetChanges` is called.
Fixed issue ARFB-176 where destroying an `AREnvironmentProbe` prior to destroying the `AREnvironmentProbeManager` would cause a crash.
Fixed issue ARFB-307 where occlusion was persisting after the `AROcclusionManager` was disabled.
