Grass everywhere

Hi Guys!

I have a project where I have 3 airports. At one of the airport I have the strange issue that I cannot kill the grass. The content-aware grass creation does not work.

I have 2 projected mesh. One on a really big area (1) with 750m squere and 2nd projected mesh on a smaller area above that.

Even if I modify the projected mesh surface type nothing happens. If I add an apron it cuts the grass but if I reduce its opacity the grass returns.

Its very odd because on the other two airport the same projected mesh creates a nice content aware grass (it responds to green areas).

I have exclude rectangles and polygons.