I was in the middle of building an AVL Tree until this odd thing happened. When I comment this printf() on line 81, my resulting balance factor shows a random(?) number when its actual BF is 0. But, when I uncomment the printf() line, the resulting BF shows 0. How is this happening?

I’m in the middle of building an AVL Tree until this odd thing happened. When i comment this printf() on line 81, my resulting balance factor shows random(?) number when it’s actual BF is 0. But, when i uncomment the printf() line, the resulting BF shows 0. How is this happening?