The 2 pixels marked in green are using the iron axe colors despite being part of the illager's head
[media]
The bottom half of the head (the part under the eyes) is still using programmer art as a base, this was reported in MC-269949, but only the top half was fixed
left is vanilla and the programmer art illager part that its using
right is a fixed one with the updated texture illager part that it should be using
[media]
Can confirm.