Closing Colour Picker causes infinite loop

[DBCS]

To reproduce:
Make a child asset of the spotlight
Edit the colour of the child asset.
Clicking okay or cancel or X on the colour picker causes the crash

1. FColorStructCustomization::OnColorPickerWindowClosed()
2. └── FPropertyValueImpl::SetValueAsString()

3.     └── FPropertyNode::NotifyPostChange()
   

4.           └── ASpotLight::PostEditChangeProperty()   <-- Triggers Property Changed Event
   

5.                 └── FColorStructCustomization::CreateColorPicker (Lambda)
   

6.                       └── DestroyColorPicker()
   

7.                             └── SWindow::NotifyWindowBeingDestroyed()
   

8.                                   └── SColorPicker::HandleParentWindowClosed()
   

9.                                         └── FColorStructCustomization::OnColorPickerWindowClosed()  <-- RECURSIVE LOOP!