Issues with Multiple Web Objects on a Single Slide

In building out some courses through Captivate, I've recently run into an issue with trying to build multiple web objects onto a single slide. Specifically, I'm trying to use multiple web objects, incorporated via embedded .zip files, that utilize the HTML 'Audio' tag to insert audio lectures onto course slides. I've had no problem doing this with single audio web objects on a slide, but only recently realized that this wasn't working when there were multiple iterations on the same slide. I am not trying to reuse the same .zip for each web object; I have a dedicated .zip for each iteration. I thought I had successfully tested things before proceeding to build about 29 courses that way, but it's wholly possible I just assumed there was no issue there. Oops.

I know that I could solve things by breaking up the lectures onto multiple slides. I could also combine the lectures into single files, but the reason I was breaking them up to start with is that, if combined, some would run as long as 15 hours. Neither fix would be too time-consuming, but I also don't see either as ideal from a user-experience point of view. I'm wondering if anyone else has run into similar issues, and if there are any other ways to approach fixing things so that multiple audio players can be placed on the same slide.

I'm happy to provide more details about my process if that's desired. Someone may wonder why I'm not using Captivate's default playbar to incorporate the audio lectures; I tried that methodology first but there were too many issues with the audio scrubbing being tied to navigation of the course slides. I'm currently involved with migrating about 140 courses of old 'distance learning' materials (primarily audio lectures that were sent via mail across the country) into SCORM format, and some best practices for course building have needed to be thrown out the window for the sake of efficiency. I'm using the 64-bit version of Captivate 2017, 10.0.0.192.

Thanks in advance!