Inject location with wikitude iOS javascript SDK

Question

I want to provide a custom GPS position to the Wikitude SDK but I can't figure how to use setUseInjectedLocation and injectLocationWithLatitude.

Right after creating WTArchitectView and WTNavigation I do:

[self.architectView injectLocationWithLatitude:48.853 longitude:2.35 accuracy:1.0];
[self.architectView setUseInjectedLocation:YES];

I set up this callback in js:

AR.context.onLocationChanged = function(latitude, longitude, altitude, accuracy)

And I keep getting position update but not the one I passed using injectLocationWithLatitude:longitude:accuracy

What I am missing here ?