My son is also on Propranolol. He has been for 1 year and 8 months. He startede the medication when he was 7 weeks old. It has a super effect. The Hemangioma is covering his bottom half ear and some of his neck. Propranolol has really worked wonders here.
So dont give up
This is a picture from when my son was 7 weeks old and had just started propranolol.
In this picture the hemangioma is almost skincolor and the ear is normal. This is after 1 year and 8 months on propranolol