4.2.0-pre.9

Assets/Scripts/UX/CheckAvailableFeatures.cs

 
         void Start()
         {
+            if(!s_MeshingSupported)
+            {
+                var activeLoader = LoaderUtility.GetActiveLoader();
+                if(activeLoader && activeLoader.GetLoadedSubsystem<XRMeshSubsystem>() != null)
+                {
+                    s_MeshingSupported = true;
+                }
+            }
             var planeDescriptors = new List<XRPlaneSubsystemDescriptor>();
             SubsystemManager.GetSubsystemDescriptors(planeDescriptors);
 
                 m_PlaneOcclusion.interactable  = true;
             }
 
-            var activeLoader = LoaderUtility.GetActiveLoader();
-            if(activeLoader && activeLoader.GetLoadedSubsystem<XRMeshSubsystem>() != null)
+            // Due to a change in XR Management version 4.0.2, where cached subsystems are cleared after XRLoader.Deinitialize is
+            // called, meshing support needs to be checked once as support will not be changed with scene changes.
+            if(s_MeshingSupported)
             {
                 m_Meshing.interactable = true;
             }
 #endif // UNITY_IOS
         }
+
+        static bool s_MeshingSupported;
     }
 }

Packages/manifest.json

 {
   "dependencies": {
     "com.unity.ide.rider": "2.0.7",
-    "com.unity.ide.visualstudio": "2.0.7",
+    "com.unity.ide.visualstudio": "2.0.8",
-    "com.unity.xr.arcore": "4.2.0-pre.8",
-    "com.unity.xr.arfoundation": "4.2.0-pre.8",
-    "com.unity.xr.arkit": "4.2.0-pre.8",
-    "com.unity.xr.arkit-face-tracking": "4.2.0-pre.8",
+    "com.unity.xr.arcore": "4.2.0-pre.9",
+    "com.unity.xr.arfoundation": "4.2.0-pre.9",
+    "com.unity.xr.arkit": "4.2.0-pre.9",
+    "com.unity.xr.arkit-face-tracking": "4.2.0-pre.9",
     "com.unity.xr.interaction.toolkit": "1.0.0-pre.3",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",

ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2020.3.4f1
-m_EditorVersionWithRevision: 2020.3.4f1 (0abb6314276a)
+m_EditorVersion: 2020.3.11f1
+m_EditorVersionWithRevision: 2020.3.11f1 (99c7afb366b3)