Torches on houses on villages

The torches inside a house in a village only lights where it is placed and the block above it

What I expected to happen...:
Torches will light every block around it

What actually happened...:
Torches just light up were block it is placed and block above it

Steps to Reproduce:
1. Find a village.
2. Get inside 1 of houses.
3. Look at the torches.