plots with old notebook() and Jupyter differ, why?

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Hi, I made some plots (normal x,y and density plots). The same code produces different plots in notebook() and Jupyter.

The plotted data is correct, but the axes are moved a little bit. For example I plotted a symmetric function, and in Jupyter the y-axis is moved a tick to the right, so that it is not in the center of the function.

I always thought, that the notebook is something like a viewer and the plots come from sage directly. But why can the differ then??