Steps to reproduce:

1. Create an empty Game Object
2. Create an empty child Game Object under the object from step 1
3. Add a Reflection Proxy Volume Component to the object from step 2
4. Select the parent object from step 1 (save the scene and re-open it if the error does not show up; repeat this step)
5. Observe the console

Reproducible with: 2022.3.13f1, 2023.2.0b16, 2023.3.0a11, 2023.3.0a14

Not reproducible with: 2021.3.32f1, 2022.3.12f1, 2023.2.0b15, 2023.3.0a10

Note: this issue is also observable in the HDRP Sample Scene Template because it contains parented Reflection Proxy Volumes.

Expected result: No errors in the console
Actual result: The following error is thrown

MissingReferenceException: The object of type 'UnityEngine.Rendering.HighDefinition.ReflectionProxyVolumeComponent' has been destroyed but you are still trying to access it.
Your script should either check if it is null or you should not destroy the object.
UnityEngine.Object+MarshalledUnityObject.TryThrowEditorNullExceptionObject (UnityEngine.Object unityObj, System.String parameterName) (at /Users/bokken/build/output/unity/unity/Runtime/Export/Scripting/UnityEngineObject.bindings.cs:697)
UnityEngine.Bindings.ThrowHelper.ThrowNullReferenceException (System.Object obj) (at /Users/bokken/build/output/unity/unity/Runtime/Export/Scripting/BindingsHelpers.cs:61)
UnityEngine.Component.get_transform () (at <e7571caf28bc4002b1df836808f968b2>:0)
UnityEditor.Rendering.HighDefinition.ReflectionProxyVolumeComponentEditor.DrawGizmosSelected (UnityEngine.Rendering.HighDefinition.ReflectionProxyVolumeComponent proxyVolumeComponent, UnityEditor.GizmoType gizmoType) (at ./Library/PackageCache/com.unity.render-pipelines.high-definition@17.0.1/Editor/Lighting/Reflection/Volume/ReflectionProxyVolumeComponentEditor.cs:56)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:206)

(On 2023.3.X)

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.Rendering.HighDefinition.ReflectionProxyVolumeComponentEditor.DrawGizmosSelected (UnityEngine.Rendering.HighDefinition.ReflectionProxyVolumeComponent proxyVolumeComponent, UnityEditor.GizmoType gizmoType) (at ./Library/PackageCache/com.unity.render-pipelines.high-definition@17.0.1/Editor/Lighting/Reflection/Volume/ReflectionProxyVolumeComponentEditor.cs:53)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:206)