Tsl Transparency issue

HTML

<script type="importmap">
	{
		"imports": {
    	"three": "https://unpkg.com/three/build/three.module.js",
			"threeGPU": "https://unpkg.com/three/build/three.webgpu.js",
      "three/addons/": "https://unpkg.com/three/examples/jsm/"
		}
	}
</script>

CSS

body {
  margin: 0;
}

JavaScript

// Choose this one for older webgl renderer
import * as THREE from 'three';

// Choose this one for web gpu renderer with TSL
// import * as THREE from 'threeGPU';
// const TSL = THREE.TSL

import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

// Choose this one for older webgl renderer
const renderer = new THREE.WebGLRenderer(); 

// Choose this one for web gpu renderer with TSL
// const renderer = new THREE.WebGPURenderer( { forceWebGL: true, } ); 
// await renderer.init(); 

renderer.outputColorSpace = THREE.SRGBColorSpace
renderer.autoClear = false
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// An example of some compressed data that when uncompressed is in srgb color space
const compressedColorTexture = new THREE.DataTexture(new Uint32Array([30]), 1, 1, THREE.RedIntegerFormat, THREE.UnsignedIntType )
compressedColorTexture.needsUpdate = true

let material

if (renderer.isWebGPURenderer) {
  // This code for WebGPURenderer Node
  class CompressedColorMaterial extends THREE.NodeMaterial {

    constructor(parameters = {}) {
      super();
      this.transparent = true;
      this.setValues(parameters)
    }

    setup( builder ) {

      const vColor = TSL.varyingProperty( 'vec4', 'vColor' );

      this.vertexNode = TSL.Fn(() => {
        const unsigned32Raw = TSL.textureLoad(compressedColorTexture, TSL.vec2(0, 0)).r;
        const exampleDecompressionToSRGBColor = TSL.vec4(
          TSL.float(unsigned32Raw).div(100),
          TSL.float(unsigned32Raw).div(200),
          TSL.float(unsigned32Raw).div(300),
          TSL.float(unsigned32Raw).div(52)
        );
        const linearSpaceColor = TSL.toWorkingColorSpace(exampleDecompressionToSRGBColor)
        vColor.assign(linearSpaceColor)
        return TSL.cameraProjectionMatrix.mul(TSL.modelViewMatrix).mul(TSL.vec4(TSL.attribute('position', 'vec3'), TSL.float(1.0)))
      })()

      this.fragmentNode = TSL.Fn(() => {
       ...