Don't move the character unless you're in the scene

src/components/character-controller.js

@@ -105,6 +105,7 @@ AFRAME.registerComponent("character-controller", {
     const startScale = new THREE.Vector3();
 
     return function(t, dt) {
+      if (!this.el.sceneEl.is("entered")) return;
       const deltaSeconds = dt / 1000;
       const root = this.el.object3D;
       const pivot = this.data.pivot.object3D;

src/scene-entry-manager.js

@@ -94,6 +94,8 @@ export default class SceneEntryManager {
         this.store.update({ activity: { lastEnteredAt: new Date().toISOString() } });
       });
     })();
+
+    this.scene.addState("entered");
   };
 
   whenSceneLoaded = callback => {