NavMeshAgent Surface component not loading in build

I've been trying to use the NavMesh Surface component. In the editor, everything works as expected. Wonderful! However, when I build the project and load it onto a device (iPad running iOS 12) the navmeshes aren't loaded. Has anyone else run into this issue? Is there something special that needs to be done to get these working? If I use the old method of simply baking a nav mesh, everything works fine.

Any help is appreciated.

 

How exactly are the NavMeshes not loading? Are the agents simply refusing to move?

 

I get an error in my Xcode panel that no nav mesh is loaded. However, when I build the nav mesh using the traditional method, this doesn't occur.