I made an automatic farm based on a YouTube video (I made the first one yesterday and had the same problem with that one, so I thought it would help me make another farm, but it didn't work). The main problem is that when I hit the bandits on the 4th or 5th wave (where there's a summoner), the summoner immediately summons Vex. I've tried different swords (without enchantments), tried waiting a minute after all the bandits have fallen through the pipe before me, tried being invisible, but nothing works. It just spawns the Vex and that's it. (The world was created on Minecraft 1.21.10 Fabric with Sodium and the mods I mentioned earlier, and was migrated to 1.21.11 Fabric with the mod updates. Everyone else who built this farm has had no problems, at least on 1.21.10, and I definitely built the farm without any errors.)
If an evoker is attacked by the player despite not being able to see them, it is guaranteed to summon vexes within a certain range (which I believe to be around five blocks). Those vexes will then attack the player.
My recommendations are to either enlarge the killing room so you can shoot the evokers from a distance (of around ten blocks to be fully safe) with a Mending bow, or to place as many boats as possible around the drop chamber to trap the summoned vexes. Note that the latter isn't foolproof and is only desirable if you have good armor with the Thorns enchantment.
I made an automatic farm based on a YouTube video (I made the first one yesterday and had the same problem with that one, so I thought it would help me make another farm, but it didn't work). The main problem is that when I hit the bandits on the 4th or 5th wave (where there's a summoner), the summoner immediately summons Vex. I've tried different swords (without enchantments), tried waiting a minute after all the bandits have fallen through the pipe before me, tried being invisible, but nothing works. It just spawns the Vex and that's it. (The world was created on Minecraft 1.21.10 Fabric with Sodium and the mods I mentioned earlier, and was migrated to 1.21.11 Fabric with the mod updates. Everyone else who built this farm has had no problems, at least on 1.21.10, and I definitely built the farm without any errors.)
If an evoker is attacked by the player despite not being able to see them, it is guaranteed to summon vexes within a certain range (which I believe to be around five blocks). Those vexes will then attack the player.
My recommendations are to either enlarge the killing room so you can shoot the evokers from a distance (of around ten blocks to be fully safe) with a Mending bow, or to place as many boats as possible around the drop chamber to trap the summoned vexes. Note that the latter isn't foolproof and is only desirable if you have good armor with the Thorns enchantment.