When editing a long line (say 400 charachters) - scroll to the middle, so some text is hidden in the right and some in the left. Click in the middle of the text. Start typing. The first character scrolls the screen again so that the cursor is in the end of the screen. So the line is scrolled away, i can’t see what’s behind the cursor, and i scroll, and when i type again, it all happens from the beginning.