In Java Edition, villagers only get the jobs if they can access the job block within 1-2 blocks. In MCPE, this is not the case. This messes with some game mechanics as sometimes villagers will take other villagers job blocks leaving some villagers having a job even without a job block
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We're tracking this issue in MCPE-45270, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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