{*}Reproduction steps{*}:
# Create a new project
# Right-click the Project window or the Hierarchy window
# Hover over expandable items
# Repeat step 3 over different menu items

{*}Expected result{*}: Hovered items do not disappear and no errors are thrown

{*}Actual result{*}: Hovered items sometimes disappear and the following error message is shown in the Console: 
{code:java}
ArgumentNullException: Value cannot be null.
Parameter name: child
UnityEngine.UIElements.ScrollView.ScrollTo (UnityEngine.UIElements.VisualElement child) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/ScrollView.cs:696)
UnityEngine.UIElements.BaseVerticalCollectionView.ScrollTo (UnityEngine.UIElements.VisualElement visualElement) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/BaseVerticalCollectionView.cs:1102)
UnityEngine.UIElements.GenericDropdownMenu.ChangeSelectedIndex (System.Int32 newIndex) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/GenericDropdownMenu.cs:668)
UnityEngine.UIElements.GenericDropdownMenu.ChangeSelectedIndex (System.Int32 newIndex) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/GenericDropdownMenu.cs:671)
UnityEngine.UIElements.GenericDropdownMenu.UpdateSelection (UnityEngine.UIElements.VisualElement target) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/GenericDropdownMenu.cs:651)
UnityEngine.UIElements.GenericDropdownMenu.OnPointerMove (UnityEngine.UIElements.PointerMoveEvent evt) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/GenericDropdownMenu.cs:591)
UnityEngine.UIElements.EventCallbackFunctor`1[TEventType].Invoke (UnityEngine.UIElements.EventBase evt) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventCallback.cs:64)
UnityEngine.UIElements.EventCallbackRegistry+DynamicCallbackList.Invoke (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventCallbackRegistry.cs:228)
UnityEngine.UIElements.EventDispatchUtilities.HandleEventAcrossPropagationPathWithCompatibilityEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.EventBase compatibilityEvt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target, System.Boolean isCapturingTarget) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:310)
UnityEngine.UIElements.EventDispatchUtilities.DispatchToCachedElementUnderPointerOrPanelRoot (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, System.Int32 pointerId, UnityEngine.Vector2 position) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:538)
UnityEngine.UIElements.EventDispatchUtilities.DispatchToCapturingElementOrElementUnderPointer (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, System.Int32 pointerId, UnityEngine.Vector2 position) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:581)
UnityEngine.UIElements.PointerEventBase`1[T].Dispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/PointerEvents.cs:1180)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/EventDispatcher.cs:336)
UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/EventDispatcher.cs:200)
UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:567)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:498)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:225)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:74)
UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:28)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at /home/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:206) {code}
{*}Platforms tested (Reproducible){*}: Rocky 8.5, macOS Ventura 13.4.1 (M1) 

{*}Platforms tested (Not Reproducible){*}: Windows 10

{*}Notes{*}: The hovered items disappear around 1/10 times and the ArgumentNullException is thrown around 1/30 times