In the world they are born at night normally but on mob traps, or on created platforms, no zombies are born, all other mobs are born, except zombies
Related issues
Comments

In the world they are born at night normally but on mob traps, or on created platforms, no zombies are born, all other mobs are born, except zombies
migrated
(Unassigned)
Unconfirmed
Android
Android 10
1.16.0.64 Beta
Retrieved
Thank you for your report!
We're actually already tracking this issue at MCPE-71684, so I will resolve and link this ticket 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.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki