Landmass Invert Shape removes all other landmass? Fixes?

I have a large landscape with 6 different mountains created using Landmass. In the center of the landscape, I want to create another landmass in a different layer that will be inverted shape (into the ground) as a crater. Normally this works fine if there’s no other landmass and it’s a brand new landscape. However, when I do this with other landmass presents, it gets rid of them. The assets are still there in outliner but they are don’t show anymore and it’s just flat around the inverted shape. Any way to fix this or do I have to wait for this bug to be fixed?

Hello,

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Thanks