WaterMaterial GLTF cannot add reflections

WaterMaterial GLTF cannot add reflections,.babylon format is ok.
Ask for help.

https://www.babylonjs-playground.com/#NIG02Z#1

Changed line 59 to
waterMaterial.addToRenderList(scene.getMeshByID("simpleShaderBall"));
(you also called this function for the first time at line 54).

https://www.babylonjs-playground.com/#NIG02Z#4

Thank you very much