Camera Blend - bug with transparency

If I create and connect a Camera Blend to the render, then the background is black.
If I copy-past a Camera Blend of snippets, then transparency works. The parameters are the same.
But if I cut my first Camera Blend and immediately insert it (Ctrl-x, Ctrl-v), or save and reopen a file then transparency appears in the render.

What’s your version and Operating System?

I know the derivative team usually needs that information to better track down issues.

Touchdesigner Build 2020.22080
OS Name Microsoft Windows 10 Home
Version 10.0.18362 Build 18362

Thanks for the report, we’ll look into it.