Instanced Static Mesh crashing when hitting play

I had the same problem. Kept crashing on play but looked fine in editor. I also was building my instances in Construction script. Anyway, the way I fixed it is by firstly removing the StaticMeshInstance from the Component list. Then go to your Construction Script > right-click in the viewport > Add InstancedStaticMeshComponent. The relative transform is unimportant as it is currently empty anyways, what is important is the Manual Attachment Bool. Set Manual Attachement to true. Then from your Add InstancedStaticMeshComponent Return Value, get a Set Static Mesh and choose your mesh.
Now that that is set up, you can begin creating instances like you would originally with the Add Instance node, and you can set the Instance Transform accordingly.

Now this should work, and if you uncheck Manual Attachement from the Add InstancedStaticMeshComponent node, it would crash. So leave it checked :stuck_out_tongue: I wasn’t able to find a similar fix if the InstacedStaticMeshComponent is created in the Component tab. Hope this works for you and whoever else is having this issue!