Adaptive subdivision surface UV reflection problem I need a help. I tried to make a wire mesh rope with UV and subsurf but there was something wrong with the reflection.

As you can see, after rendering, it looks like the reflection is changed in the middle of UV map:





This is the UV map and nodes:




Here is the modifier:



Anyone who knows why this happens? How can I have the right reflection on the surface?
After spending hours more, i got what i wanted finally.
only what i did was cut off the area causing problem. ^^
- cut off UV texture
- cut off faces

But i still wonder why.