Landscape not appearing in packaged game

Hello.

I have a project where I uploaded a heightmap (takes up four standard squares of landscape space 2x2), and I added a bunch of landscape on the outside. When I package my project, the 2x2 middle section doesn’t appear, however the rest does. The 2x2 center area does not have a corresponding landscape proxy item in the outliner. does anyone know how to fix this?