This means its probably a manufactureing issue.
ei. not all controllers, are as "tight" around that area, as nintendo planned.
(stuff like wear and tear, and plasic giveing abit, could also be causeing it).
Wonder if Nintendo is aware of this.
If not, they should pay this guy (if pressure fix really works) for finding it (the root cause).
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071