It's not automatic. It's invisibility that doesn't allow you to move.
If you look at those racial traits, some of them will be labeled "this is a permanent enhancement, placed on you." That means they'll always be there, like the +5 agility. Other ones will be labeled something like "augmentation placed on you." That means they're a buff...and racial trait buffs last 3 minutes with a 30 minute recast timer. So, most of those aren't worth much. The invisibility is this way, although for a class with no invis, it can come in handy sometimes.