[Bug]: Scrollbar is hardly stable

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is there a StackOverflow question about this issue?

- [X] I have searched StackOverflow

### What happened?

Scrollbar is hardly stable.
When I drag down and drag up, you can see the scrollbar position jump other place.
[Screen_recording_20240703_165416.webm](https://github.com/android/nowinandroid/assets/48680511/716d20b6-0603-427e-aabe-4c27d99d2f37)

https://github.com/android/nowinandroid/assets/48680511/16aa3e05-39e2-4b5e-95e8-ee409ce21809

### Relevant logcat output

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

No source file, test, screen, or entry point is identified. Start by reproducing the scrollbar jump using the linked recordings and trace the affected screen's scrolling implementation. Done means dragging down and up no longer causes the scrollbar position to jump; add or update a regression test if the relevant test location can be identified.

Written by the indexing model from the issue text.