The scrolling is a byproduct of a fix that makes sure the cursor is always visible on the screen, and I'm afraid I don't see a way it can be fixed at the moment without bringing back the invisible cursor issue. I did change it after your report to smoothly scroll however, so the movement should not be as jarring as it was before.
I think you should see this. I didn’t mean that the scrolling when Up/down navigation. That was a perfectly smooth scroll. But it auto scroll to the top when I am typing like “Hello” or Right/Left Navigation. So I can’t see the above text to continue reading and typing.