Mobs can spawn on wood logs with single fence on it.

After the update today to 1.14.0 I recognized mobs spawing on top of my "wall" which is made of wood logs and a single fence on it. Never had something spawn on it. In the screenshots you see Husks spawn on it, looking at me from above. I think it's related to mobs now being able to spawn on leafes and trees as well. Some spawn rules are not correct any more.