Why Doesn't my Bread Open at the Score?

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Why Doesn't my Bread Open at the Score?

1st, 2nd and 3rd photos are the bread I made before. They are ok, but 4th photo is not good. Sometimes my breads are like the 4th photo. Why could ıt be?

 

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Probably more than one thing.  Could be overproofed, poorly slashed, steamed differently.  Also, although I don't think it's an issue here, keep in mind that when you make additional cuts they take some oomph out of the main one.