White slides in Storyline , not fully loaded

Hello everyone,

Please note that English is not my first language, and I am writing from Germany, so I apologize in advance for any mistakes.

I am experiencing an issue with our E-Learning content that I have not been able to resolve:

Some users report that they cannot view the E-Learning modules – they only see a white screen (they see the most slides and then there is one white). I have tried to reproduce this issue myself using different devices and browsers, but I couldn’t replicate the problem.

To troubleshoot, I created another E-Learning module, this time avoiding the use of too many variables and triggers, thinking that complexity might be the cause. However, the same issue occurred. The affected users had to restart the module to view the content, which unfortunately resets their progress.

I suspect that the module sizes (115 MB and 90 MB) might be too large, preventing them from loading correctly, especially for users with slower internet connections. At home, I have a 400 Mbit connection, and the issue does not occur for me, which supports this theory.

Has anyone encountered similar problems or has suggestions for solving this? Is there any solution other than reducing the module size to make the content load more reliably?

Thank you very much for your help!