Zombie pathfinds through diagonal blocks

When a zombie has noticed a villager, it will try to pathfind through diagonal blocks, even though there is no way to walk through (Attached image). Im not sure if the same applies for when tracking a player.
To reproduce it should be as easy as placing a diagonal wall, and spawning a zombie on one side, and a villager on the other. The wall has to be a decent width for the issue to apply.