Disappearing grass as I approach, before it reappears

[S-Matrix]

Hi STEP forums! I'm having an issue as I outlined in the post header - I ran NGIO's precacher and generated Grass LOD with DynDOLOD. As I approach patches of LOD grass that are (presumably) outside the immediate cell I'm in, it disappears for about 10 to 30 seconds (30 is very rare) before reappearing as regular, non-LOD grass. This is, as you might guess, quite jarring, and I'm wondering what I did wrong or if there's a known problem with my setup.

I'm happy to provide any information that might be relevant to this, I just don't know what that info would be.
(for reference regarding grass mods however: I am using NGIO, Landscape Fixes for Grass Mods, and Folkvangr)