Horizontal split screen view is immensely useful for working on large orchestral scores. It’s such a good feature. It would be really nice if the user doesn’t need to manually match the horizontal positions (sometimes it can be disorienting working in this mode).
Just by way of a quick workaround: as long as Preferences > Play > Playhead is set to Follow playhead during playback, hitting P to initiate playback should put whatever it is you want to see on screen. Then hit P again to stop playback.
Yes, the starting point can be seen in both the views, but the bars still don’t line up.