Multi-Answer Options Not Clicking in LMS365

Hello Articulate team,

I'm having difficulty with an Articulate Storyline course I deployed into a SCORM-compliant SharePoint/LMS365 environment. Some, but not all, of my users are getting to a multi-answer slide and finding the buttons are not "clickable" - they do not respond at all when clicked.

An Articulate support person was able to re-create the issue and rebuild my slides in question, but when I redeployed, some people were still having the same problem. The slides work in Review360, but not in the live environment.

Is there some sort of compatibility issue I'm not aware of?