Yes and No
It is not normal because it doesn't happen with every ear infection
, but it is not unexpected.
It is most likely that the ear infection has created a hole in the ear drum (performation)... Like a popped zit (sorry for the visual). Most perforations related to ear infections will close within 3-4 days. There is no urgency in getting this looked at, but on next visit.. The pediatrician can take look.