Hi Daniel,
It's hard to say what's going on without seeing the lesson, and specifically what you're seeing when you interact with the lesson. If you can start a support chat, or we can schedule a screensharing meeting, that would be ideal - but if not, perhaps you can send us a video of what you're seeing / trying to do, and possibly send us your lesson as well. You can send these to support at smartbuilder.com. We'll probably send you a detailed video response, and then reply here with a quick summary of our findings.
Here's some non-specific information about handling the Hide and Lock features and how the Master might fit into that. Hopefully that helps:
https://share.smartbuilder.com/public/support/individual/ridder-2022-06-24.mp4- Nav