How to reproduce:
1. Open attached “IN-97043” project
2. Open the “SampleScene”
3. Select the “New Auto Tile” asset in the Project tab
4. In the Inspector notice red overlay on the same tiles as displayed in the Scene view
5. Scroll down in the Inspector to find “Load” button above pipe tiles
6. Click on the “Load” button and select “Template”
7. Observe the Scene view and the Inspector

Expected result: Both terrain and pipe tiles are displayed in the Scene view, displayed tiles have red overlays in the Inspector
Actual result: Only pipe tiles are displayed in the Scene view, in the Inspector tiles from both templates have red overlays

Reproducible with: 4.2.1 (6000.1.0b12, 6000.2.0a7), 4.3.0 (6000.1.0b12, 6000.2.0a7)
Couldn’t test with: 3.1.3 (2022.3.60f1), 4.1.0 (6000.0.45f1) (AutoTile not introduced)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Note: After loading the “Template” clicking on terrain tiles with red overlays causes errors to appear in the Console: “KeyNotFoundException: The given key '186' was not present in the dictionary.”