SNOO often calms fussing within 40-60 seconds. So, if fussing stops quickly as SNOO increases the motion/sound, your baby just needed a little more soothing and is not very hungry.
However, if the fussing is continuing for more than a minute, it usually means your baby needs some help…a feeding, a nappy change, a hug, etc.
You do not need to wait for the bed to “time out” and stop itself. Trust your instincts!