Evokers continue attacking nothing after target dies

The bug

When there are multiple evokers and one of them gets attacked, all of the evokers except for the originally attacked one will continue summoning fangs and vexes after their target dies.

To reproduce

• Spawn multiple evokers
• Spawn a snow golem

Original description

I just created a chaos with many types of illagers, iron golems and blazemen together. After the fighting, some ranged illagers, like pillagers and evokers, attack the "air" although their target died already.