When rendering animation with multiple channels (e.g. RGB + Depth + MaterialID),
the wrong bitmap channel is randomly rendered for transparent objects, e.g. hair and grass
For depth:
on Frame 1, the depth of the hair is correctly rendered in the depth map
on Frame 2, the depth for the hair is being rendered by a color channel
This happens randomly during rendering, but happens in all renders.

I've tried with a nVidia GTX960 and nVidia RTX2060 with the same result.

To recreate:
Create any character with long hair preset
Apply any animation
Render with iRay Standalone selecting Depth and MaterialID compositing channels
Observe channels are often rendered incorrectly

Attached are examples showing the hair from consecutive frames. Frame 2 shows the incorrect result.