Steps to reproduce:
1. Open the attached Unity project “GRD-Profiler-repro.zip”
2. Open “QA_GRD_Demo” Scene in the Project
3. Open Profiler window (Window > Analysis > Profiler)
4. Profiler in Play mode
5. Select Rendering Module and move profiler chart selector
6. Close Profiler window
7. Reopen Profiler window and observe the Console window

Actual results: “InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation” errors are thrown in the Console window

Expected results: No errors are thrown in the Console window

Reproducible with versions: 6000.7.0b2, 7000.0.0a1

Can’t test with versions: 6000.6.2f1 and lower (Project breaks after downgrade)

Tested on (OS): macOS 27 (Apple silicon)

InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation
UnityEngine.UIElements.VisualElement+Hierarchy.ValidateElementCanBeModified () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:630)
UnityEngine.UIElements.VisualElement+Hierarchy.Clear (UnityEngine.UIElements.VisualElementClearOptions options) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:815)
UnityEngine.UIElements.VisualElement.Clear (UnityEngine.UIElements.VisualElementClearOptions options) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:347)
UnityEngine.UIElements.VisualElement.Clear () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElementHierarchy.cs:314)
UnityEditorInternal.Profiling.RenderingDetailsViewController.ReloadData (System.Int64 selectedFrameIndex) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerModules/Rendering/RenderingDetailsViewController.cs:229)
UnityEditorInternal.Profiling.RenderingDetailsViewController.OnFrameChanged (System.Int64 idx) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerModules/Rendering/RenderingDetailsViewController.cs:225)
UnityEditor.ProfilerWindow.InvokeSelectedFrameIndexChangedEventIfNecessary (System.Int32 newFrame) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:2304)
UnityEditor.ProfilerWindow.SetCurrentFrameRangeDontPause (System.Nullable`1[T] frameRange) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1737)
UnityEditor.ProfilerWindow.SetCurrentFrameDontPause (System.Int32 frame) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1728)
UnityEditor.ProfilerWindow.SetCurrentFrame (System.Int32 frame) (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1748)
UnityEditor.ProfilerWindow.SelectAndStayOnLatestFrame () (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1718)
UnityEditor.ProfilerWindow.FrameNavigationControls () (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1692)
UnityEditor.ProfilerWindow.DrawMainToolbar () (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1506)
UnityEditor.ProfilerWindow.DoLegacyToolbarGUI () (at /Users/bokken/build/output/unity/unity/Modules/ProfilerEditor/ProfilerWindow/ProfilerWindow.cs:1771)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/IMGUIContainer.cs:392)
UnityEditor.GUIView:ProcessEvent(EntityId, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUIView.cs:89)