Unreal Engine Issues and Bug Tracker (UE-107238)

Steps to Reproduce

Create a landscape and have Edit Layers enabled for it.
Add a landscape material that has a couple layers in a Landscape Layer Blend node.
Save the material.
Paint each of the layers onto the landscape.
Save the level.
Delete one of the layers from the Landscape Layer Blend in the landscape material.
Save the material.
Delete that same layer under the target layers in the Landscape Edit Paint mode.
Save the level.
Change to another level and then change back to the test level.
Go to the Landscape Edit Paint mode and the deleted target layer will still be there.

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Fixed

Component	UE - LD & Modeling - Terrain - Landscape
Target Fix	4.27

Fix Commit	15238037
Main Commit	15238037

Deleted weightmap layer reappears with landscape edit layers