Disappearing GroundCover in T3D

I've noticed that all groundcover folliage sometimes disappears in T3D. This usually happens when the camera position changes, like when going down from a slope and at the same time looking up and down. It will appear again if i look up/down.

This happens both with the game .exe and inside the editor.

Anyone know how to fix this issue?

Thanks.

EDIT: nevermind, i fixed the issue. It had to do with visibleDistance..