Hi, James!
Thanks for reaching out and I'm sorry to hear that you're experiencing this issue. I'm happy to help troubleshoot and would like to ask some clarifying questions to start.
- Have you tried importing the file into a new presentation before importing it into Storyline? If so, does the issue persist?
- What version of Storyline are you using?
It's possible that there's an object or element in your PowerPoint file that could be causing the issue, but it's hard to confirm without further testing. If you're comfortable sharing your file with our team, I'd be happy to investigate what's going on. You can upload it here or share it privately in a support case. We'll delete it from our systems once troubleshooting is complete!