I experienced what seemed to be a bug in which the majority of passive mobs that I was paying attention to (villagers, chickens, cats etc.) de-spawned from areas that were enclosed and/or well lit.
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kiizde
migrated
Thank you for your report!
We're tracking this issue in MCPE-144208, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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