Unable to Scroll Up in Jupyter Notebook

## Description

When attempting to scroll up in a Jupyter notebook, the view automatically bounces back down to the current position. This prevents the user from reviewing earlier cells or content above the current view.

## Reproduce

1. Open a Jupyter notebook.
2. Execute a few cells to create scrollable content.
3. Attempt to scroll up to view earlier content in the notebook.
4. Observe the behavior: the view bounces back to the current execution cell.

## Expected behavior

It should let me scroll up.

Start by reproducing the behavior in a Jupyter notebook using the four steps described: create scrollable content by executing cells, then scroll upward. Trace the notebook's scrolling behavior from there; done means earlier cells and content remain visible when scrolling up instead of bouncing back to the current execution cell.

Written by the indexing model from the issue text.