My bearded is being grouchy to me

About 2 weeks ago it happened and I thought he might be brumating so I've left him alone. Today when I was feeding him he got upset, ran away hissing. He was very angry. I don't know if I should leave him alone longer or is he upset I haven't been holding him? Advice please. No change in eating, he's out of shed and had a soak which he always enjoys.