What Anti-patterns Do You See with the System Demo?

Not having a System Demo
A System Demo that is just the Team Review as a combined meeting
No feedback from participants in the System Demo
The content of the System Demo “surprises” the Product Management team
Great demo, but no one knows where are up to in the PI
- Or System Demo doesn’t show metrics of progress
System Demo is not showing the work on a single “close to production” system
System Demo only talks about Features and does not reference PI Objectives
The System Demo is more a PowerPoint presentation or discussion than a demonstration of real working software
Related, the System Demo doesn't use real data and real scenarios, but rather test data, to show the working system
System Demo does not talk about what happened to the feedback that was previously provided
Spending too much time preparing for the System Demo
Team members of the ART are not invited to the System Demo