Proxy Landscape problem with material.

Hello! I am making an open world game using world composition. I have done it before and went well, but now the proxy Landscape of level 2 looks like a mirror even though it is copied from Level 1 ok. What am I doing wrong?

I solved it, it could be a bug. If I apply the material and layers before duplicating the landscape via world composition, I have to paint the entire new landscape without seeing exactly where paint goes and then try a second layer which then show where I didn’t paint it well. If I apply the material after I make all the copies of the initial landscape it works fine.