Gears of War 2: Insane checkpoint glitch in Act III

On insane mode, in Chapter 3 Act 3, when you have reached the entrance to the temple at the top of the mountain, it seems there is a bug in the checkpoint system. When you go through the temple entrance, it does not register the checkpoint. To address the issue, go backwards to the start of the chapter. There will be a giant tree fallen across the path, drive to this point, then turn around and go back to the temple entrance adn the checkpoint will clear. I hear this also affects hardcore mode.