Issues with load_learner

What are the things that are not loaded when loading a model with load_learner?
For example,
learner.summary() does not work for models loaded with load_learner (on fastai 1.0.42) but it does work for model loaded with .load()

Another thing that I reckon is the size used for data transform is also not included (but normalization stats are included) when loading with load_learner.