Chickens were bred in a pen less than 20x20 and disappear when I leave the area and return. Has happened both when I travel a distance away or to the Nether through a nearby portal. Does not happen to bred cows; I have no other animals being bred. Only started happening today, have been playing for a couple of weeks without this happening.
Related issues
Comments


Get real. They're chattel, not pets. They don't need names, they just stay in the pen til I need arrows. This is a new problem.

Thank you for your report!
We're tracking this issue in MCPE-21416, 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.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Per MCPE-21416 the unexpected despawning is usually occurring on chunk borders, so if you make your pen entirely inside a single chunk you might be able to prevent bred chickens from despawning.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
They're probably despawning. Try naming them.