fixed disabling reason states, added occlusion to UX scene, updated packages to latest AR Foundaton preview, updated project 2019.4 LTS

Assets/UX/Scenes/UXManagerScene.unity

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Assets/UX/Scripts/ARUXReasonsManager.cs

     void OnEnable()
     {
         ARSession.stateChanged += ARSessionOnstateChanged;
+        if (!m_ShowNotTrackingReasons)
+        {
+            m_ReasonParent.SetActive(false);
+        }
+    }
+
+    void OnDisable()
+    {
+        ARSession.stateChanged -= ARSessionOnstateChanged;
-        if (!m_SessionTracking)
-        {
-            m_CurrentReason = ARSession.notTrackingReason;
-            ShowReason();
-        }
-        else
+        if (m_ShowNotTrackingReasons)
-            if (m_ReasonDisplayText.gameObject.activeSelf)
+            if (!m_SessionTracking)
-                m_ReasonParent.SetActive(false);
+                m_CurrentReason = ARSession.notTrackingReason;
+                ShowReason();
+            }
+            else
+            {
+                if (m_ReasonDisplayText.gameObject.activeSelf)
+                {
+                    m_ReasonParent.SetActive(false);
+                }
             }
         }
     }

Assets/XR/XRGeneralSettings.asset

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ProjectSettings/ProjectVersion.txt

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