Replicator does not work properly after recreate graph

I tried to make an extension from fruit drop example. The extension work perfect in the first run as you can see from the picture.


The problem is that in the first run it create AssetCache prims, but in the second run (after remove old layer) it doesn’t create AssetCache prims anymore. The SamepledAssets still create new objects but does not link to any mesh so that it doesn’t appear on screen.

The only way to make it works again is create new stage.
Hope anyone can help me to find the answer for this problem. Thank you!