Is my bunny's head hair loss and shedding normal for molting?

Thanks for your question about Autumn, and thank you for the photos - they are very helpful. Rabbits can be quite varied in the way that they molt, and this may be a variation in Autumn's molt. There is also an infectious agent that can result in areas that look similar to what is occurring on Autumn's head. It is a fungal organism called dermatophytosis, or ring worm. There can be no redness, and no itching. Occasionally there is flaking like you mentioned, and often it can resolve and recur in cycles, similar to what you are describing happened to Autumn. Unfortunately, ring worm is zoonotic, which means that it can be passed from animals to humans.
My recommendation would be to take Autumn to a veterinarian for evaluation. They can take samples of the hairs on Autumn's head and perform a fungal culture on them. They can also perform a thorough physical examination on Autumn to ensure that they don't find any abnormalities - the reason I bring this part up is that typically ringworm should not affect healthy individuals with a competent immune system. Until you can get Autumn to a veterinarian, I would recommend washing your hands after handling him.
I hope that this gives you a place to start, and I wish you and Autumn the best.