NullReferenceException on serialized classes in an array can break interaction with the Inspector

This problem can render the inspector mostly unresponsive until you click off the game object.

Repro:
1. Create a new project.
2. Import attached Repro.cs script.
3. Create an empty GameObject in hierarchy and add Repro.cs as a component.
4. Add two items to the Sound Clips array.
5. Remove two items from the Sound Clips array.
6. Add an item to the Sound Clips array.

Expected: No visual issues.
Actual: The item in Step 6 is empty.

7. Click and drag the empty item.
Extended Issue: Much of the inspector will throw NullReferenceExceptions when you click on it, and is unresponsive until you select another item to display in the inspector. (This also fixes the NullReferenceExceptions and the missing item)
See error details below.

Reproducible in: 2023.2.0b4
Not Reproducible in: 2023.1.0a1, 2022.3.7f1, 2021.3.29f1
Marking as a regression. Did not regression test further, please contact the ticket reporter if you need this done.

Notes:

• Tested on Windows 10
• See attachments for video of this occurring.
• See also [Internal link] for another error visible in the video.

  NullReferenceException: Object reference not set to an instance of an object
  UnityEngine.UIElements.ListViewDraggerAnimated.OnDrop (UnityEngine.Vector3 pointerPosition) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.DragEventsProcessor.OnPointerUpEvent (UnityEngine.UIElements.PointerUpEvent evt) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventCallbackFunctor`1[TEventType].Invoke (UnityEngine.UIElements.EventBase evt) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventCallbackRegistry+DynamicCallbackList.Invoke (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatchUtilities.HandleEvent_TrickleDownCallbacks (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement element) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatchUtilities.HandleEventAcrossPropagationPathWithCompatibilityEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.EventBase compatibilityEvt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target, System.Boolean isCapturingTarget) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatchUtilities.PropagateEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target, System.Boolean isCapturingTarget) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatchUtilities.DispatchToCapturingElement (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, System.Int32 pointerId, UnityEngine.Vector2 position) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatchUtilities.DispatchToCapturingElementOrElementUnderPointer (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, System.Int32 pointerId, UnityEngine.Vector2 position) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.PointerEventBase`1[T].Dispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at <aa3ec7e2ca8b4084bec2604d78034962>:0)
  UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at <12925959293b4620817a59e0f861a519>:0)