1.Add a new folder in content browser and rename it with Chinese characters like '测试'
2.Copy a texture with any name into that folder
3.Create a material and material instance with a texture parameter
4.Try to assign the texture in the folder with Chinese name to the material instance, the operation will fail and you will get no response
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-101981 in the post.