Replay button does not replay entire slide

I have a Storyline slide with 6 layers. There's the base layer, then 5 layers that 'show' when the user clicks a graphic icon on the base layer. When I let the slide play through to the end, then click Replay, it replays the 'show' action and plays the audio of the first layer while all other layers remain showing on the screen. It doesn't go back all the way to the beginning of the timeline.