Audio randomly changing volume in slide exported to video format

Hi Reka, 

Thanks so much for your follow-up response and screenshots! Very helpful to get a better understanding of what you've tried so far. Much appreciated! :) 

I'd like to have our talented Support Engineers weigh in on this AI-generated narration. I've gone ahead and opened a support case on your behalf. We'll be in touch via email shortly to take a closer look at your file. 

Thanks for your patience and have a wonderful holiday season! 🎉