Villager AI on double layer carpets

Put the summary of the bug you're having here

What I expected to happen was...:
If you put a villager on two layers of carpet the ai of the villager should recognise it as air blocks, so i would not move

What actually happened was...:
the villager still somehow path-finds to other double layered carpet if it is next to the original carpet

Steps to Reproduce:
1. make a large room
2. replace the floor with a double layer of carpets
3. spawn villagers in the room