Bug ComputeShader doesn't work correctly in AssetBundle

the project I've tested it works in Editor or Mobile Devices when the ComputeShader doesn't in AssetBundle.
Attach a script using this ComputeShader in a scene or loading by Resources.Load is perfectly worked. but when I build AssetBundle. it doesn't work anymore.

I've tested in these situations in unity 2019.4.16f1 and unity 2020.3.11f1

Situation 1: Assetbundle file with a scene and this ComputeShader.
Situation 2: Assetbundle file with a scene and another assetbundle file with this ComputeShader.

both situation doesn't work correctly.
when I call ComputeShader.FindKernel, it always throws ArgumentException: Kernel 'CSMain' not found.

code below:

Code (CSharp):

1. string csf = Path.Combine(Application.streamingAssetsPath, "computeshader.ab");
2. AssetBundle ab = AssetBundle.LoadFromFile(csf);
3. ComputeShader _ComputeShader = ab.LoadAsset<ComputeShader>("computeshader.compute");
4. ComputeShader _Instance_ComputeShader = Instantiate(_ComputeShader);
5. int Kernel = _Instance_ComputeShader.FindKernel("CSMain");    //throws the exception in this line.