As in the title.
They can pick up loot, but they do not use it.
Environment
macOS Sierra 10.12.1 beta
MC-108123
{CanPickUpLoot:1b} Vindicators don't use their better weapon
Resolved
Fixed
0
They pick it up, but they don't render it, the axe is an in game effect, and not stored in the entity, thus it cannot be changed.