(It's my first issue on Github, I apologize in advance for my English.)

MLibTest throw 'System.ComponentModel.Win32Exception' when I repeat to turn on/off ColorPicker and move tab1<->tab2 a few time.

'System.ComponentModel.Win32Exception' is also thrown randomly, when I repeat a few time to create a Window which include a DockingManager(having documents) then to close the Window.

And I found the issue that

// added inside FloatingWindowContentHost.BuildWindowCore(HandleRef)
AutomationProperties.SetName(_rootPresenter, "FloatingWindowHost");

resolves the exception.

I thought it can be applied to LayoutAutoHideWindowControl so I tried the below.

// added inside LayoutAutoHideWindowControl.BuildWindowCore(HandleRef)
AutomationProperties.SetName(_internalHostPresenter, "InternalWindowHost");

Then it seems the exception does not occur.

Does this issue happen to others and is my trial correct to resolve it?