Published course NVDA reads "clickable graphic lesson topic bullet bullet bullet topic" ??

Hi, Joe. I'm suspecting that it's not my slides, per se, but something in the way they're published. I'm attaching a video where I am using NVDA to navigate a slide, and I set it up so you can hear the settings. I hear the "graphic topic bullet bullet..." right after the "top" of the slide. This video is from a publish to HTML file. The same exact phenomenon occurs with JAWS.

It's also happening in the 360 "review" publish, but in that environment, you hear "multiplication symbol" also in a nearby object, leading me to believe that there's visibly-hidden structure in the player that's being revealed by the screen reader. 

I'll see if I can repro this in a smaller file that I can send to you. I have NDAs which prevent me from uploading the whole thing, even if it's private. This video doesn't disclose much so I think it's okay.