Ravagers and witches attack themselves when a "Johnny" patrol leader is nearby

Under the guidance of Johnny Vindicator, the ravager and witch attack themselves

Very simple steps to reproduce:

• /summon minecraft:vindicator ~ ~1 ~ {PatrolLeader:1b,Patrolling:1b,Johnny:1b}

• summon a Ravager next to they
  Observe the phenomenon. You should now see the Ravager starting to attack itself.

Replace the Ravager in the above process with a Witch, and you can observe the Witch attacking itself, but the witch will only use healing potions and regeneration potions when attacking herself.