Fix regression

Author: nicoco007

Source/CustomAvatar/Avatar/AvatarLoader.cs

@@ -143,6 +143,7 @@ private async Task<AvatarPrefab> LoadAssetBundle(string fullPath, IProgress<floa
 
                 prefabObject.hideFlags |= HideFlags.DontUnloadUnusedAsset;
                 prefabObject.name = $"AvatarPrefab({avatarPrefab.descriptor.name})";
+                prefabObject.SetActive(false);
 
                 await ShaderRepair.FixShadersOnGameObjectAsync(prefabObject);