Easy AR, and other AR SDK as well, moves the camera and the objects in order to create the virtual reality effect. This way, when you try to use a navmesh, particles ou certain types of animation, it may not work as espected. But you can change your settings in a way that fits you.
For example, in my case, I've changed the ImageTrackerBehaviour CenterTarget to "FirstTarget", this way only the camera moves.
I've also changed a line in the ImageTrackerBehaviour to rotate the object in the AR.
pose = args.ImageRotationMatrixGlobal * pose * Matrix4x4.Rotate(Quaternion.Euler(-90, 0, 180));
You may change the values in "Quartenion.Euler" to achieve your desire.