someone figured it out in the c4d forums. all i had to do was uncheck Auto Refresh Previews in Options in the RedShift Shader Graph and that pretty much fixed it. It's now 95% better.

@Dr-Sassi thanks for your reply. I am using RS RenderView - with IPR turned on - and my scene is just a cube, light, camera. it couldn't be a simpler scene.

Hey all, I'm new to C4D, transitioning over from Modo. I just purchased a new system with an RTX 4090 in hopes of getting going in C4D/Redshift. And I'm going through Greyscalegrollia tutorials. But I'm running into a very annoying issue. I'm using Redshift and I have IPR running as that is the workflow I'm used to in Modo. But I'm noticing that when I am moving a slider - like the Weight slider for Subsurface, the IPR updates no problem. But as soon as I let go of the slider, I can't click on it again for another second or two. After C4D is responsive again, I can click and drag, and then as soon as I let go again, same thing.

Any ideas? thanks!