I would start with the HTML options tab when publishing (if it works when you preview in chrome vs after you publish).
Do you have ‘Publish for Seamless Play’ checked? If so, try unchecking that –
Uncheck ‘Create ALT tags for images and buttons perhaps?
Basically, just try some different options to better diagnose where the problems lies – maybe someone else has run into this though, and can provide the solution…
Also – are you testing after you upload to your LMS, or outside the LMS? just wondering if the problem persists across both.