I'm at the point (around 78%) where I turn off the valves under the lighthouse. When I do, there's a conversation with the girls by the waterway, and then Clare jumps into the tunnel. However, then my guy starts (seemingly) walking to go follow her but runs into Alia and just stops. I can't do anything at this point because the game seems to be locked into playing out that animation but is unable to complete it. Is this a known bug? Is there any way to fix it/progress?
Edit: I figured out that the game assumes you will come through the door via the left side and then the animation plays out just fine. If you enter on the right the bug occurs.