Ambient etc. are lost when scene is build to AssetBundle. Is this a bug?

Set the lighting setting to Bake, build lighting. and build a scene to an AssetBundle.

When you load an AssetBundle from StreamingAssets and activate it, ambient is lost. moreover, reflection by standard shader does't seem to refer to the reflection probe. because it's so white. looking at the lighting window, at the run time, GeneralGI is also returned to the default.

I tried the target android. and unity5.5.1

is this a bug?