Foliage disappears after 1.5k if occlusion culling project setting is disabled

When unchecking the Occlusion culling option in the project settings, if you place over 1.5k foliage meshes in the world, they stop rendering, the meshes are still present in the level and can be seen in wireframe mode, but are otherwise invisible. Erasing to a number under 1.5k allows the meshes to reappear. This issue is a regression.

Version Tested:
4.16.3 - CL: 3561208 - Issue does not occur
4.17.1 - CL: 3586342 - Issue occurs
4.18 - CL: 3597901 - Issue occurs

Regression:
Working:
Broken:

1. Create a new project (no template or starter content needed)
2. Go into "project settings > rendering" uncheck "occlusion culling"
3. Create a new landscape
4. Add a new mesh to the foliage types
5. Place more than 1.5k of the foliage in the world
   Result: The foliage meshes do not render
   Expected Result: The foliage meshes render