LWRP and Sorting Group not compatible?

I was using sorting groups to handle the layering of my prefabs that has a local hierarchy of layered sprites. It was working as expected until I switched to a Lightweight Render Pipeline where sorting groups appear to simply cease functioning.

Is this a documented issue? Or am I missing something?

Please advice

Hi, which version of Unity are you using?

Support for this has been added from 2018.3:
2D: Added support for custom axis sorting and Sorting Groups in SRP.

You can get the beta from:
https://unity3d.com/unity/beta-download