Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info
Repro Rate: 3/3
Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did NOT occur there, it is a regression.
Results: Landscape generates with grass applied to the entire landscape.
Expected: Landscape generates having no grass, with the preview weight having no effect in-scene.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-151561 in the post.