Invisible Pillagers

The pillager's bodies near the outpost are invisible, but their clothes are visible.  In addition, their clothing are different from others.  I was creating worlds with different seeds and seen another world where the pillagers looked normal, but this seed -4085477578057551425 I spawned near an outpost and they were different.  I am in creative mode without any mods.  I supplied a picture of this mob.  Is this a mob that I never seen before or a bug in the snapshot?