The bug
Villagers already skilled in profession (i.e. apprentice, journeyman, expert, master) but without job site do not get precedence over unemployed villagers when a that job site block becomes available.
Because "skilled" villagers do not lose their profession, this can lead to an unemployed villager being assigned that already has a "skilled unemployed" villager with that profession.
These villagers are unable to trade further once trade cap as they do not have a job site block.
Ideally, when a new job site block becomes available it should search for any "skilled" villager which does not have a job site block assigned before assigning to an unemployed villager.
How to reproduce
Create or find a "village" and have some unemployed villagers
Add a job site block (this should now be assigned to a villager)
Trade with the villager until they are "skilled"
Destroy job site block
Add same job site block in village
→ This will now be assigned to a villager, this could be an unemployed villager instead of a villager already skilled in that profession
Related issues
is duplicated by
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Comments
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Can confirm for 1.15.2 and 20w15a
Jobless villagers seem to have priority over skilled villagers when a new jobsite block is placed.
There's 10 villagers in this pen, only one composter, the apprentice level farmer was the first farmer. Then I broke its composter and placed a new one and a diffrent villager aquired the jobsite instead of the first farmer.
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Still present in 20w16a
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still present in 20w17a
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still present in 20w18a
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still present in 20w19a
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I just wanna add that this happen even with already existing/assigned workstations. Sometimes a unemployed villager will steal the job from a skilled one leaving him wondering around the village never returning to his former workstation.
This happen to me in 1.15.2 with 2 skilled villager at the same time. The only noticeable factor is that those 2 workstation are the farthest form the village center.
Good luck!
migrated
This bug seems to only be partially fixed, A villager with a profession will get precedence on claiming a unclaimed jobsite over a jobless villager. But a villager of higher level does not always get precedence over a villager of the same profession but lower level. According to the 20w22a changelog, the most skilled villager should claim unclaimed jobsites first.
See this screenshot from 1.16 Pre-release 3, the villager who have claimed the composter is the Apprentice level Farmer and not the Journeyman level Farmer.
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It does not always happen but as with this bug pre 20w22a, it is more prevalent to happening if the jobsite blocks are broken and placed rapidly.
coschevi