Landscape Component oversized

I have a problem with one of my landscape compenent. It’s oversized compare to my another component. I can’t find why. Can someone help me ? Thanks.

I just realized that the component isn’t oversized.
Some landscape compenent show height and normal texture correcly, other not.I very need help, please.

I usually get these effects when shaders are still compiling. Does this persist when the compilation has finished?

EDIT: Just noticed you wrote this 13 hours later, I will assume the problem persists.
Have you tried painting on the parts that are not properly displayed? maybe this will update them.

Thanks for the reply. I will try to compile, again. I tried yo paint with other material layer. And it’s exacly the same problem. Material normal and height work on this square, not on the other.