Hi @Cedric Van Laere — welcome to Figma Forum! 
Thanks for surfacing this and for the clear video walkthrough — really helpful. I can see the inconsistency you're pointing out between the design canvas and prototype behavior.
A couple of things come to mind:
- First, I’m wondering: Was the modified component with fewer documents created by duplicating the original, then removing a few rows (that is how I would have done it, just want to confirm)? I’m curious if there might be a lingering nested layer or override that’s persisting and being picked up in prototype mode. When you have a moment, could you check the left sidebar layer panel to see if anything unexpected is still nested inside the modified instance?
- Second, if that doesn’t clear things up: Can you try restarting the Figma app? For more information on quick fixes, check out this troubleshooting checklist.
If the issue’s still happening after that, our Product Support team can take a closer look into the file where this is happening. To get that started, reach out directly and include:
- the link to this Forum thread for context
- a full-size screen recording of the issue (including the left sidebar and layer setup, if possible)
- the link to the affected file
- edit access granted to support-share@figma.com.
Appreciate you flagging this — let me know how things go or if anything else comes up. 