How to Detach and Lock 3D Model in World Space (initial position) to see its animation even marker got lost?

I’m working on an AR project using 8th Wall where I have one animated .glb file that includes a central circle and multiple rockets. The animation starts from the center (placed on the marker), and the rockets fly outward into the room and then return.

My goal:
When the user scans the marker, I want the model to appear once at that real-world position and stay fixed there β€” no matter how the user moves their phone. As the rockets animate outward, I want users to physically move around to follow the rockets’ paths, like exploring a scene in the room. But right now, the whole model shifts slightly with camera movement. Please help me to create an AR experience that only need marker to trigger experience, once started there’s no need to continue scan And most important everything got stuck in its first original position, don’t move with mobile movement.