Landscape normals along the edge are incorrect (when using edit layers)

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1. Create a landscape with edit layers enabled (repros with any size, but easiest to see with the lowest resolution)
2. View the normals (View Mode > Buffer Visualization > World Normal)
3. Notice that two edges have non-flat normals:

If that doesn't show the issue..  try saving the map and loading it up again, then going into landscape edit mode.

Or try using the "Add" option to add a new landscape tile, that almost always shows it.

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