Attaching the renders I get. Not sure, sorry, on whether there's anything else in terms of libraries etc. Note that there are still artifacts, just different from what you saw. (PS, I just used the same CoronaBitmap, and loaded the second environment into it - not sure if you maybe had another CoronaBitmap that you had a different rotation on or something, which you dropped into the Scene Env override?)
Note, internal 311287120