So thanks to forum user : crazymaitreyoda we have locate the problem.
its in a file in the art-stadiums-pitch_assets_all.bundle thats blending the stuff.
its a large script where you olso can edit line's and stuff.

For now there is a simpel solution to get rid of the black lines.
See the screenshot.

<B>Go to preference -> See all -> Match Day -> 3D -> set texture quality to -> Medium or Very High.</B>



i will try to locate in the script whats the problem is, so maybe for V4 we can fix it.
but for now you can use the pitch turf mod.