Mobs will often get stuck in the troughs made of trapdoors in spruce villages. Once I had to rescue 4 villagers, a cat, and a cow from one by opening the trapdoors. Since I thik mobs cant see trapdoors as a solid block, I don't think they realize they have to jump to get out.
Thank you for your report!
We're actually already tracking this issue in MC-50556, so I resolved and linked 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 in the future to see if the issue has already been reported.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki