Creating an iron\snow golem with jack o lantern keeps the light

When building a snow golem or iron golem using a jack'o'lantern the light source remains where the head was placed, even after the mob walks off.

A lighting update in the area does not resolve the issue, a block needs to be placed and destroyed where the head was originally placed to remove the light source.

What I expected to happen was...:
When building the snow/iron golem, the light from the jack'o'lantern shouldn't exist

What actually happened was...:
A phantom light source remains where the block was originally placed

Steps to Reproduce:
1. Build a snow or iron golem with a jack'o'lantern.

Notes
Does not persist through a reload