No audio on a new slide

I'm new to using Articulate and cant seem to figure this one out. I've replaced a slide within my scene and used the text to speech option as I did with all the others. I can see my wavelength in my timeline and can hear it when I preview under audio tools. But the wavelength isn't showing in the audio editor feature where I'd go to add "silence" to my text. During preview project, everything works as it should except the audio? Can someone tell me what I'm missing? Thank you in advance!