"NullReferenceException" is thrown in the Console when un-maximizing the Build Analysis window docked next to the Game tab

Steps to reproduce:
1. Create new Unity project using Universal 3D Template
2. Open Build Analysis window
3. Dock Build Analysis window next to Game tab
4. Right-click on Build Analysis window > check Maximize
5. Right-click on Build Analysis window > uncheck Maximize
6. Observe the Console window 

Actual results:  “NullReferenceException: Object reference not set to an instance of an object” error is thrown in the Console window

Expected results: No errors are thrown in the Console window

Reproducible with versions: 6000.6.0a6

Can’t test with versions: 6000.0.76f1, 6000.3.15f1, 6000.4.8f1, 6000.5.0b9 (No Build Analysis)

Tested on (OS): Windows 11, macOS Tahoe 26.4.1

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.Build.Analysis.BuildAnalysisWindow.SavePersistedState () (at /Users/bokken/build/output/unity/unity/Modules/BuildAnalysis/UI/BuildAnalysisWindow.cs:531)
UnityEditor.Build.Analysis.BuildAnalysisWindow.OnDisable () (at /Users/bokken/build/output/unity/unity/Modules/BuildAnalysis/UI/BuildAnalysisWindow.cs:82)
UnityEditor.GenericMenu:CatchMenu(Object, String[], Int32) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUI/GenericMenu.cs:162)