Vindicators are having problems with their AI because once a one vindicator sees you it'll run at you and hit you once but if you stay in your place without moving ,it'll have some problems with its weapon and you can see that it tries to hold its axe but it fails and then hides it,also if they were inside a small hole they won't hold their axe when they're aggressive,however they were used before to hold their axe when they become aggressive