Tilemaps Normals are Flipped upon Opening Editor with Tilemaps in Level

A licensee has reported that the normals for their tilemaps upon initial load of the editor are flipped. This is also true when they launch their packaged project. All the normals of their tilemaps render flipped and they need to "poke" them in order to have them render correctly.

1. Download and Open the Attached project
2. Click on the Tilemap place in the scene.

Outcome The surface of the tilemap becomes green coinciding with the lights placement.

Expected Upon initial load of the level, the surface is already green and does not require any interaction for it to render as expected.