Vex retaliates against Evoker when hit by Evoker's fangs

The Vex retaliates against the Evoker when it gets hit by their fangs. This is because Vex are not immune to Evoker's fangs. This is not affected by Evoker's summoned Vexes. This also applies to other Illagers.

Expected Results: The Vex continues to attack its target, ignoring the fang attacks from Evoker.

Observed Results: The Vex retaliates against the Evoker when hit by their fangs.

Reproduce Steps:
1. Spawn an Evoker.
2. Spawn an Villager.
3. Spawn a vex before the Evoker spawns the fangs.

But an alternate way is you can also reproduce this with a Pillager.