LWRP light2d not work with SortingGroup

first, i am korean. english is not my language...
obviously there will be language mistakes in this thread and I apologize if it is unpleasant. (0 0) (_ _)

i'm using light 2d.
this is a embarrassing work screen, but I took screenshots for explanation.





I checked the 'Battle Cinematic' layer.

but in test play, the output was black.





I've touched this one to solve this problem.
and resetting the layers in the Sorting Group solved the problem.

but this is not the normal way.





setting the Target sorting layers in Light 2D to 'All' works fine.

I think the order between Light2D and SortingGroup is the problem. maybe. haha...

I don't know if this problem has already been reported, but I couldn't find it after searching, so I wrote a thread.

thanks for reading.