Steps to reproduce:

1. Open the attached project
2. Select Main Camera or Directional Light in the Hierarchy
3. Press the CTRL+Shift+A shortcut to open Add Component window
4. Observe the Console

Actual results: GUI Rendering errors are thrown

Expected results: No errors are thrown after the shortcut is used

Reproducible with versions: 6000.0.13f1, 6000.0.48f1, 6000.1.2f1, 6000.2.0a10

Not reproducible with versions: 2022.3.61f1, 6000.0.12f1

Reproducible on (OS): Ubuntu 24.04

Not reproducible on (OS): macOS 15.4.1

Notes:

• Errors are not thrown when the Add Component window is opened using the Editor button in the Inspector window

Error messages:
{quote} * GUI Window tried to begin rendering while something else had not finished rendering! Either you have a recursive OnGUI rendering, or the previous OnGUI did not clean up properly.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

• InvalidOperationException: Stack empty.

System.Collections.Generic.Stack`1[T].Peek () (at <467dcef8ceb84c1e92dc7c69d21858a8>:0)
UnityEngine.UIElements.UIR.RenderChainCommand.ExecuteNonDrawMesh (UnityEngine.UIElements.UIR.DrawParams drawParams, System.Single pixelsPerPoint, System.Exception& immediateException) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Renderer/UIRenderer/UIRenderers.cs:168)
UnityEngine.UIElements.UIR.UIRenderDevice.EvaluateChain (UnityEngine.UIElements.UIR.RenderChainCommand head, UnityEngine.Material initialMat, UnityEngine.Material defaultMat, UnityEngine.Texture gradientSettings, UnityEngine.Texture shaderInfo, System.Single pixelsPerPoint, System.Exception& immediateException) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Renderer/UIRenderer/UIRenderDevice.cs:1019)
UnityEngine.UIElements.UIR.RenderChain.Render () (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Renderer/UIRRenderChain.cs:541)
UnityEngine.UIElements.UIRRepaintUpdater.Render () (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Renderer/UIRRepaintUpdater.cs:124)
UnityEngine.UIElements.BaseVisualElementPanel.Render () (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:719)
UnityEngine.UIElements.Panel.Render () (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:1378)
UnityEditor.UIElements.EditorPanel.Render () (at /home/bokken/build/output/unity/unity/Modules/UIElementsEditor/EditorPanel.cs:97)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:484)
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:232)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /home/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:76)
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:30)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at /home/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:219)

• Assertion failed on expression: 'srcAttach < m_CurrentFramebuffer.colorCount && "We should always resolve only current RT"'{quote}