UE5.4.4 Nanite Landscape - edges of landscape components disappearing

Doing some experimentation to learn more about Nanite, and enabled it on an existing landscape (UE 5.4.4). I’m noticing around the edges of the landscape components in the grid, sections are disappearing at distance. Here’s a zoomed out shot to really highlight the impact, but when at normal view distances there is some bad culling happening too resulting in patches popping in and out as you navigate around the level. Where should I start to look to address this? I’m not sure if this is a more general nanite thing or something specific with nanite landscapes (or even material used).

Just as as a side note, I saw the docs talk about thrashing / missing & blinking geometry related to the Nanite streaming pool size, and max candidate/visible clusters. I tried some values for the pool size from the default of 512 up to 1536 with no difference. And nanitestats seemed to show the clusters were well under the default values for candidate/visible so I don’t think that’s the issue.