https://www.babylonjs-playground.com/#7RH606#15
Line 36, onPointerDownObservable only works for one click unless you click outside the canvas.
change to onPointerClickObservable or onPointerUpObservable and neither work at all
https://www.babylonjs-playground.com/#7RH606#15
Line 36, onPointerDownObservable only works for one click unless you click outside the canvas.
change to onPointerClickObservable or onPointerUpObservable and neither work at all
isPointerBlocker 
https://www.babylonjs-playground.com/#7RH606#16
Docs error then Use the Babylon GUI - Babylon.js Documentation not a bug. 
Will update
Already done 
Fast work 
good team work as well 