If component library template has a root level id specified, adding it to the scene doesn't initially make it visible in navigator

For example, drag a "Model Blend" item from "Qt Quick 3D Particle System Templates" category into navigator. The system appears in text editor, but it doesn't appear in navigator. Saving the document will make it appear in the navigator as well. 

This happens because "Model Blend" has a source template that has id specified for the root item instead of relying on autogenerated id.