Wobbly trackpads may have affected multiple early XPS 15 9500 units, but it has emerged that others will not stay closed when they are picked up. Picking up some XPS 15 9500 machines causes their display lid to pop open, almost as if no magnets are holding them in place. Dell is yet to acknowledge the issue publicly, but there are multiple examples of it spread across Dell Community and Reddit forums.
https://www.notebookcheck.net/Some-Dell-XPS-15-9500-machines-may-have-a-display-hinge-issue.486365.0.html