Please have a look at the click-event of the marker. Seems as if you were using the implementation of the SDK samples project and forgot to update the marker.js animation which is started when the user clicks a POI.
I have an issue using Wikitude SDK on Android. I put all my pois over AR View correctly and y get an event when the user taps on a poi. On this event I open a new Activity with POI Info. But when I go back to AR View I can see blue squares below the pois (show the image attach). Anyone knows how to correct it?