Left, Right, Middle, Left, Middle, Right. Do not deviate. Practice this pattern in the "Chase Practice Mode" added by the patch (accessible from the pause menu).
Early feedback from the patch indicates a much smoother progression flow. Most players report that the "chokepoint" at the three-quarter mark of the chapter is now challenging but fair. However, a small subset of the community has noted a new visual glitch involving "flickering shadows" in high-density areas, which is likely a priority for the next hotfix. metf chapter 3 patched