unity 5.6 assetbundle shader name lost

Questions & Answers
1

hi there, im using Unity 5.1.0f1 version.
Now i decide to upgrade Unity 5.6, when i load assetbundles which builded in Unity5.1.0f3 ,i found the shader name is empty,so i cant use “obj.material.shader=Shader.Find(“XXX”)” to reset the shader.
So, is there any way to get the shader name in Unity 5.6?
I dont want to rebuild all the assetbundles in 5.6.

2

Me too.

Why shader name from assetbundle lost?

3

Me too.

Wish someone knows how to solve this problem.