It’s that simple. I used to choose a lullaby, and it would “start automatically” with the “heart beat,” “lights go out,” and the lullaby started. It no longer has an option to choose the same one to “start automatically” when you start tracking as it used to be.
Could you please investigate why this was removed from sleep tracking. Last night, it took me an hour of sleeplessness to figure out what was missing! I did it manually, and promptly went to sleep.