Hi, I don't know why this wasn't reported, but now it is (Report ID=CC4D-1025).
For now, I can't tell if this is something we could fix or related to Corona at all, but it doesn't happen with Redshift or Standard render.
I will be sure to return here once I have any news.
Meanwhile, I would like to understand one thing, which I am sure will be also the first thing our developers ask:
How exactly is this feature more useful to you than the native Corona features such as VFB IR or Interactive Viewport? Why is it so important to use the native C4D Render Viewport? Preferably, please explain it as you would explain it to a 5-year old, or at least a non-C4D user.
Thank you in advance.