Wikitude

Multiple targets from on device wtc only fires one, until refresh triggered

I'm using the same markup as the example of multiple targets, only changing the wtc file and the trackable2DObject name parameters. I have tested on iphone 6s & 5 and on an iPad mini 2 and iPad 2. 2, all running iOS 9.2. 

Once the app is up and the AR window runs, whichever is the first tracking image I encounter, the drawable works fine. But then it won't recognize a second one, only that first one. I have tried with both and it's only a matter of which one it hits first.

Then, if I go out of app by going to the home screen and then go back to the app, the AR view flickers (I'm assuming doing some sort of a refresh) and both targets work correctly. 

Is there a way to trigger the refresh just to make sure the AR.ClientTracker is fully loaded? I know there is an onLoaded event, and it triggers even when it is behaving as described above.

Is this some known bug?