@ronott1 same problem. Don’t know what happened. Bread rose BEAUTIFULLY, but not turning out as sour as I would like. I did everything you said. I have no idea what is going on.
I have a hypothesis, though. Maybe the original yeast died and was replaced with a different type of yeast, and that is affecting the sour flavor.
I have no idea. Maybe my microscope will reveal something.
Next time I try to make sourdough bread, I will document EXACTLY what I do, and post it. Maybe I am doing something wrong.