villager fall through farmland

Can you provide more informations?

For example if the villager was in a minecart and the Minecraft clipped through the farmland

Thank you for your report!
However, this issue is Incomplete.

Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.

You are welcome to create a new ticket about your issue with more detailed information. In case of a game crash, be sure to attach the crash report from minecraft/crash-reports/crash-<DATE>-client.txt.
However, please review the Bug Tracker Guidelines before creating new reports. Be sure to search for an existing issue as it is likely to have already been reported.

Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki