The bug
The summoner of a vex is not reset once it is dead.
How to reproduce
- Spawn an evoker
- Summon a villager next to it
/summon villager ~ ~ ~ {NoAI:1b}
- Wait for the evoker to summon vexes
โ The vexes attack the villager - Kill the evoker
/kill @e[type=minecraft:evoker]
- Prevent the vexes from starving
/execute as @e[type=vex] run data merge entity @e[type=vex,limit=1] {LifeTicks:2147483647}
- Switch to Survival or Adventure mode
โ The vexes attack you - Switch to Creative or Spectator mode
โ The vexes attack the villager again even though their summoner is dead and they normally don't attack villagers