Hi there, Laura!
Sorry you're at this obstacle. I can appreciate that it's frustrating when only a few learners are experiencing freezing while you're unable to replicate the behavior on your end.
I'm also unable to reproduce any issues in the published output on SCORM Cloud/Chrome 75, but I won't give up until we sort what's happening! Let's see if we can find a trend:
- Where did you host the published output?
- What version of Chrome are the affected learners using?
- What happens when they view my published output link on their machine?