Grass now in rows

While I was using a photogrammetry program (Agisoft) and while that took it’s time working on a large model.

I thought I’d alter the depth of field of a small 4.12 game level in Ue4. Because the computers power was limited I’d completed the DOF edit before the projects Shaders had compiled. I took a screen shot of the depth of field settings and closed the project but accidentally pressed save. When I opened the project again all the foliage painted grass that had previously been randomly shaded was now in rows like a crop.

The grass appears like this now on every new 4.12 project though not older ones (4.9.2). Does anyone have a solution.