You have to de-zombie them twice before they have the low trades, and won't switch professions sometimes.
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Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.
Is this still an issue in the latest version? If yes, can you please add it to the affected versions (or mention it if you are not the reporter)?
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yes it is still an issue, I've made another report about with more information

Thank you for your report!
We're tracking this issue in MCPE-131043, so this ticket is being resolved and linked as a duplicate.
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Update: They do not change trades at all. It is not working on bedrock realms or in bedrock itself