Strange water material behavior in Virtual Camera project

I'm trying to do some experiments with Epic Virtual Camera learn project.

When I change transform of the plane with water surface material on the default project map the water becomes muddy and almost non transparent like at the bottom image:

After making build of the default map with that changes the water surface back to its normal state as it was by default when I open project at the first time. Image of the default water state:

Then I create my custom level and copy to it plane with that water surface material from the default project map. The water becomes muddy and non transparent again.

But the problem is that even when I make build of my custom level with copy of plane and water surface material it not becomes transparent as it was on the default project map.

Can some body please explain how to make a copy of that plane with water surface material to appear on other custom level as it was on default project level?