-Custome Pass renderer disappears along with InvalidOperationException on changing Custom Pass renderers index.
-Custom Pass list option disappears.
-There is no workaround, and the list itself disappears with continuous errors in the console. User cannot add any Custom Pass due to list disappearance.

Steps to repro:
1. Create a new HDRP template project.
2. Hierarchy > Volume > Custom Pass.
3. Add FullScreenCustomPass > Add Custom Clear.
4. Drag the Custom Clear to top of the list.

Actual Result:
InvalidOperationException error in the console.

Expected Result:
No errors in the console.

Reproducible in:
2021.1.0a5 with Package version 10.1.0.

Working Fine in:
2021.1.0a4, 2020.2.0b11 with Package version 10.1.0.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stacktrace:
InvalidOperationException: The operation is not possible when moved past all properties (Next returned false)
UnityEditor.SerializedProperty.Verify (UnityEditor.SerializedProperty+VerifyFlags verifyFlags) (at <20090764902e4293871cd9b1a16b42f1>:0)
UnityEditor.SerializedProperty.get_boolValue () (at <20090764902e4293871cd9b1a16b42f1>:0)
UnityEditor.Rendering.HighDefinition.CustomPassDrawer.GetPropertyHeight (UnityEditor.SerializedProperty property, UnityEngine.GUIContent label) (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/editor/renderpipeline/custompass/custompassdrawer.cs:256)
UnityEditor.Rendering.HighDefinition.CustomPassVolumeEditor+<>c__DisplayClass18_0.<CreateReorderableList>b__2 (System.Int32 index) (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/editor/renderpipeline/custompass/custompassvolumeeditor.cs:213)
UnityEditorInternal.ReorderableList.CacheIfNeeded () (at <20090764902e4293871cd9b1a16b42f1>:0)
UnityEditorInternal.ReorderableList.GetListElementHeight () (at <20090764902e4293871cd9b1a16b42f1>:0)
UnityEditorInternal.ReorderableList.GetHeight () (at <20090764902e4293871cd9b1a16b42f1>:0)
UnityEditor.Rendering.HighDefinition.CustomPassVolumeEditor.DrawCustomPassReorderableList () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/editor/renderpipeline/custompass/custompassvolumeeditor.cs:174)
UnityEditor.Rendering.HighDefinition.CustomPassVolumeEditor.OnInspectorGUI () (at library/packagecache/com.unity.render-pipelines.high-definition@10.1.0/editor/renderpipeline/custompass/custompassvolumeeditor.cs:69)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <a6a005afc2b4452b8438a54c51eab950>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)