From #99354

• Focus a notebook cell
• Scroll so that it's out of the viewport
• Now that element doesn't exist, so it can't be focused, so context keys that depend on that row's context key service won't apply, and keybindings that should be handled by the list (like arrow keys) won't be executed

Probably the easiest fix is to get rid of the row element-level focus concept, and figure out how to adjust context keys to compensate for it. Or, don't unrender the focused cell element and keep it around but invisible somewhere.