Is working as expected here, can you give some more information - such as, is this every scene, or one particular scene? This is the Corona VFB Render Region that you are referring to (not a C4D render region)? Can you take us through the precise steps (or share a video), e.g. do you create the region then start IR, or start IR then create the render, etc. Anything unusual about the scene, does it have any other problems, can you send it to us via the private uploader? Is this PC or Mac, and if Mac, which OS?