Issue with audio playing back in Articulate Storyline - mp3 file fine, when imported into a particular slide it creates choppy/duplicated audio

Hi, I'm writing because I'm having an issue with one particular slide in my elearning project.  All of the other slides are working fine with audio, animation, etc., but one particular slides has a simple set of animations (objects and text below them fading in following a narration), but the narration is periodically duplicating the narration sound.  The mp3 is clean that I'm importing in.  I tried re-creating the slide with graphics and text from the .ppt and importing the clean mp4 audio but it's still happening.  It seems like some kind of corruption or glitch, but why would it happen on one slide consistently?  

Any feedback or tips are appreciated.

Marc