Hm, I am out of luck here.
Frames 1,2, and 3 render only the dark reflection. First frame in light green is frame 4.
I ran a few render series during the day and had weird stuff going on in the first frames.
Once frame 2 rendered half dark and half green, on one occasion the frame rendered completely
black, even though the pre-calculated dots while rendering clearly showed the greenish colour.
I also rendered the 80 frame long animation and there were a few more (3-4) darker images
in between besides the first three frames.
My system specs are in the footnote. Windows update ran the last time today
with a few important and recommended updates installing.
I am curious now what might cause this and what my machine is missing...
Cheers, Klaus