AssetBundleManager | An asset bundle manager for Unity | Plugin library

I noticed in your AssetbundleDownloadingScript you are creating a GameObject santaasset, however you are never assigning the object to a new or an existing GameObject, or even Instantiating it. You are instead assigning the Asset that you are loading from your bundle. However that asset is also never assigned, since it was just loaded into memory, so that Unity could recognize it. This is what you are experiencing, and this is why you see the object in game, but its not active, even tough its not disabled.

To fix this issue, you must assign your GameObject or Instantiate it like so:
GameObject santaasset = Instantiate(bundle.LoadAsset("animation_keyframes_increase_v1", typeof(GameObject)) as GameObject);

The Meteor build remembers the last setting when you were running locally, which is technically a bug, but never been resolved as there is a workaround.

In order to build an APK, you need to make sure your build area is fresh, this script does that: