Vindicators display wooden axes when they spawn in raids

With the new Raids being added in the game it seems like Vindicators that spawn inside these Raids are displaying and dropping after get killed Wooden Axes:

But this doesn't affect their Base Damage, in this Screenshot I still in Hard Dificulty and they still dealt the same Damage as before.

And this is not the case with Vindicators that are spawned with a Spawn Egg

They even drop the Wooden Axe normally, instead of being an Iron Axe, so it's not just a Visual Bug