Hello Christian,
Happy to help!
It looks like you published your course using a version of Storyline 360 that's a few updates behind. Please try updating to the latest version and republishing your course with the 'Connectivity Alert' disabled to see if this fixes the behavior.
You'll also want to test how your course behaves in a different LMS just to see if the behavior you're experiencing is LMS specific. If the issue persists, please share a copy of your project file here or in private by opening a support case so we can take a closer look at what's happening. We'll delete it when we're done testing!
