When I hit the Go to Start button in Cinema 4D the scene in the viewport does not go back to frame 0. It simply stays where I paused it. The playhead will go to frame zero but the animation does not. Additionally, Go to Previous Frame does not move the animation in the viewport but only the playhead. Go to Next Frame does advance the animation and playhead 1 frame. If I grab the playhead with my mouse and scrub it forward the animation follows. If I grab the playhead and scrub it backward the animation does nothing. Someone please help me here as this is absolutely maddening.
A few thoughts: If this is only happening in one project, copy everything into a new project and see if that fixes it. That project may have become corrupted. If it happens in every project and a restart doesn’t help, you could try reinstalling C4D.