Change wrong material bug?

before i upload my sense is working fine,and it can change right material.once i click the upload botton and open the sense again,it changed the wrong material or even turn to black when i click the material ball??
the bug is boring me serval days,by the way,i have checked all material name,and it is no same name.

This is most likely caused by some of the textures for the material picker being placed in texture atlases when the scene is uploaded. To prevent material picker textures from being atlased the textures in the material pool should tile. You can find more a detailed answer in this thread: Material picker problem - #4 by ntxdave

i have that problem like lidingxing ? can you help me, wojtek?

Did you try the solution from the post linked by @wojtek?