I skimmed your post for three seconds and already know what the problem is. Don't use save states. This is a known occurrence due to that (at at least this and one other spot you've already passed). Reload the latest in game save and play from there. It will pass that spot then.
By the way, the screen goes black because an FMV is about to play, and I'm pretty sure the halt at Cleyra is also when the FMV is played. I wonder why it's only those two FMVs that give this problem when save states are used.
By the way, the screen goes black because an FMV is about to play, and I'm pretty sure the halt at Cleyra is also when the FMV is played. I wonder why it's only those two FMVs that give this problem when save states are used.