Steps to reproduce:
1. Open the attached project "ARTemplateNew.zip"
2. Open "Assets/Scenes/SceneA.unity"
3. Enter Play Mode and press the "Go to SceneB" Button
4. Observe at the top left "AR Init Count: " and "Subsystem running: true"
5. Press the Button "Back To SceneA" and "Go to SceneB" again
6. Observe the "AR Init Count" increase to 2 and "Subsystem running: false"

Expected Results: Initialize() in Unity.XR.Simulation.SimulationSessionSubsystem is successfully initialized the second time
Actual Results: Initialize() in Unity.XR.Simulation.SimulationSessionSubsystem is not called when entering the same Scene a second time

Reproducible with: AR Foundation 6.0.6 - 6.3.0 (6000.0.60f1, 6000.2.9f1, 6000.3.0b8, 6000.4.0a4)
Could not test on AR Foundation 5.2.0 (2022.3.68f1) due to errors relating to 'ARTrackablesChangedEventArgs<>' after downgrading

Environment tested: Windows 11 24H2

Notes:
-A fix is to add m_Initialized = false; in Stop() function of "SimulationSessionSubsystem.cs"