Call the "destroy()" function of element which contains Scene3D and never painted will cause crash.

First I change the parent of  an unvisible element Rectangle1, form Window A to WindowB.

Then I create a child element for Rectangle1 which called Rectangle2 contains Scene3D

If I call "destroy()"function of Rectangle2 before touched any elements that would trigger windowB repaint，the program will crash. 

If I interacted with a button or something, in my case hover the mouse to a button make it change color, then call "destroy()"function of Rectangle2，the program work fine.