I've recently updated the H.Engine from 18.0.532 to 18.5.596 (latest production build) and have issues with all tools that were using a combination between generated meshes alongside point cloud instances as output via simple merge nodes in the end.
I feel the setup is quite common and I've used it multiple times - heightfield w/ scattered prefabs; generated surface with copied prefab geometry.
All of the tools operated on the following basis:
Houdini Setup:
Unity 2019.3.1f result:
I'm also linking a simplified tool with the case.
Any pointers or help on how to better handle such cases would be much appreciated!