Mesh data will be deleted from the Static Mesh if added as a Hierarchical Instanced Static Mesh Component through blueprint. All of the mesh data (actual geometry) and LODs will be deleted from the static mesh asset.
This is a regression:
Working in 4.16.3-3561208
Not working in 4.17.0-3573198
This bug erases all the mesh data if mesh is used as instance in Hierarchical Instanced Static Mesh Component. Mesh data is completely removed after editor restart.
This bug deletes all the static mesh data, along with all LOD setup, etc. There is no way to somehow restore the 'erased' mesh other than re-importing it again.
Results: The mesh data (actual geometry) will be deleted from the static mesh that was used in the BP
Head over to the existingAnswerHub thread and let us know what's up.