Destroying the scene on a cloned entity element mouseup event fires exception

Forum thread: https://forum.playcanvas.com/t/cannot-read-property-active-of-null/21115
Project: https://playcanvas.com/editor/scene/1195817

The blue button is a runtime clone of the green button. Both buttons have a script that destroys the scene root on mouseup.

The green button when pressed is fine.

The blue button (clone) when pressed fires an exception:

Uncaught TypeError: Cannot read property 'active' of null
    at ButtonComponent.get (playcanvas-stable.dbg.js:43169)
    at ButtonComponent._determineVisualState (playcanvas-stable.dbg.js:48769)
    at ButtonComponent._updateVisualState (playcanvas-stable.dbg.js:48703)
    at ButtonComponent._onMouseUp (playcanvas-stable.dbg.js:48611)
    at ElementComponent.fire (playcanvas-stable.dbg.js:799)
    at ElementInput._fireEvent (playcanvas-stable.dbg.js:73923)
    at ElementInput._onElementMouseEvent (playcanvas-stable.dbg.js:73785)
    at ElementInput._handleUp (playcanvas-stable.dbg.js:73610)

Code that does the clone is: BrandSelectButtonsGroup

I believe this is due to the initialisation order difference from loading a hierarchy vs a clone.

Reproduce the linked PlayCanvas scene and inspect the BrandSelectButtonsGroup clone path alongside ButtonComponent._onMouseUp and _determineVisualState in the stack trace. Compare cloned and loaded hierarchy initialization, then verify that destroying the scene root during mouseup no longer raises the reported null active-property exception.