Strange artifacts above grass

Hello again guys i have another problem. I seem to have a strange artifact appearing slightly above my grass foliage .its only very slight but i know its there and its very annoying i have checked my material but i cannot figure out what is causing my problem I have tried my best to capture it in this video …any help is greatly appreciated thanks guys

Check to see if the Alpha channel of your grass image is set to transparent at the top of the image. Or try another image for you grass texture.

This is just a guess.