Landscape material reverts to default when launched onto an Android device

From user SONB:

Launching the project for the first time on Android device the landscape has the correct material applied. However, if I change something in the material (for example adding a LandscapeVisibilityMask node), compile and save it, and launch the project on the device, the default material (checkered) is applied to the landscape.

There is a workaround, which works every time: I just close the Editor, delete the folder Intermediate in the project and restart the Editor again. On the next launch on the device the correct material is shown on the landscape.

The Mobile Preview shows always the correct material, without deleting any folders.

UPDATE: It is not necessary to delete the Intermediate folder. It's enough just to restart the editor, on the next launch on the device the correct material will be applied to the landscape.

Here is the link to the user's project: [Link Removed]

Related bugs:
[Link Removed]

1. Open user's project in editor
2. Check mobile preview to ensure that it shows correctly applied landscape material
3. Launch onto Android device from editor

Results: Default material is applied to landscape when project launches onto device.

Expected: Landscape material appears sand colored, which is the correct material.

Failed to find shader map for default material WorldGridMaterial!

[4.7.1][Android] Landscape showing default material on launch

Failed to find shader map for default material WorldGridMaterial!