ThreeJS SubdivisionModifier not subdivide correctly a plane geometry

Description of the problem

i’m trying to subdivide a plane geometry on threeJS using SubdivisionModifie, i did this the last year and it worked fine, but now i updated my threeJS and SubdivisionModifie, and when i try to subdivide my plane geometry give me a different result.

code:

var subdivisions = 4; var modifier = new THREE.SubdivisionModifier( subdivisions ); modifier.modify( geometry, subdivisions ); geometry.computeFaceNormals(); geometry.computeVertexNormals(); child.geometry.dispose(); child.geometry = geometry;

Before update: https://i.stack.imgur.com/LQ6VV.png
After update: https://i.stack.imgur.com/FFbSM.png

Three.js version

• Dev
• r83
• …

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• Linux
• Android
• IOS

Hardware Requirements (graphics card, VR Device, …)