Stencil and LineRenderer temporal inconsistency.

[sterile olive]

I am using a LineRenderer to cover up a stencil boundary and have found that the first time it draws, the transparent portion either cuts out other objects completely or renders as black. There is a proximity trigger on my Line Renderer, and if i walk away and come back, it is always renders fine every time after the first, but the first time renders incorrectly 90% of the time. I have tried preloading the mesh and material, and forcing the trigger through times delays and none of them seem to fix the issue.

the image on the left is the first time and is cutting out the clouds, and then if i walk away and come back immediately, the issue is gone, and never comes back until I close the session, whereupon it happens the first time again.

above is the transparent version, this is the black version