I've been trying out some large scenes (Kitbash3D assets – scene file about 500MB) and every time I close the LV window (irrespective of whether the render is paused or not), C4D hangs. I get the spinning beach ball, and I have to force quit C4D.
This behaviour does not occur with smaller, lower-poly scenes. I've included the crash log after the force quit.
macOS 10.15.6, C4D R21, 64GB RAM, RX 5700XT.