Camera Rendered Thumbnail has opaque background only in built player

Hello,
I recently switched to LWRP and found that my thumbnail renderer is now rendering opaque backgrounds, but only in the built player.

I have a camera render to a render texture and then convert that texture to a sprite.

What it looks like in editor:

What it looks like when I run the built executable:


This doesn't happen in my non LWRP build. The background of the character's thumbnail is the color of the camera clear color (so if I set it to black with zero alpha, it'll be black instead of white in the built version). It doesn't seem to respect the alpha in the built executable

Anyone have an idea of what could be causing this?
Thank you
-Yang

 

Okay, I think I figured it out. This seems to only happen if "Opaque Texture" is checked under general settings for my LWRP asset. Not sure if this is an intended consequence of opaque texture or not ...

 

Was suffering this same issue in 2019.2. Went to 2019.3 Beta and that fixed it, however there is now an issue related to transparency artifacting (transparency not being cleared).