Grass mods draw issue

[chiefs4322]

Having green throughout the game makes it more enjoyable sometimes but whenever I use a grass mod and run across the map I inevitably run into a section the grass hasnt drawn yet and sometimes takes 15 or 20 seconds to appear. Its not only grass, rarely cars or even bad guys but those things are uncommon. True Grass and Grasslands both do it and playing with draw distance and density made no visible difference. I have a 1080ti so I feel like it should be handling the load. Any info on why this happens would help me to at least research it, I am apparently alone or more likely searching incorrect terminology. Thanks.