FPP Grass flicker Issue

Hi guys this is an animation im working on this animation and i know still has many problems ie: the floating tress ect. but what i cant seem to fix is the grass flicker @ 0:24 and between 01:29 to 01:34 using Forest pack lite
if i do a view port preview the issue is not there, any idea as to what might be causing this?

oh okay makes sense but doesn’t that mean it will animate as well or i just assume it will

will just use corona scatter instead

Or you tell Forest Pack not to depend on the active camera.

I remember once have some similar issue. I corrected changing the “back offset” in camera tab of forest to “0”. Maybe that helps.
Any recomendation on how to make roads like that on uneven terrain?.. Looks like autodesk Civil ones.

here you are