2019.4 LTS has reached end-of-life. This port is cancelled.
How to reproduce:
1. Open the user attached “presetmanager-terrain.zip” project
2. Open Assets > Scenes > SampleScene
3. In the Hierarchy create a new Terrain object
4. In the Inspector reset the Terrain Collider component
Expected results: A new object created should load the presets for all their components
Actual results: The component has to be reset to load the preset data