Quote - Yes, create a terrain, use 2 material layers. Add an ecosystem layer to base layer and populate.
Next add an ecosystem layer to the 2nd layer. No need to add anything to the list.
First eco layer has disappeared.

No Bruno - it has not been fixed.  I just downloaded and checked Build 46408.  I grappled with this all day yesterday before I realized what bug I was dealing with.  And here I was the one who raised the issue way back when on September 4 in my Quirk or Norm post.

In referring back to my own post, though, I remembered how I could get around it.