This bug, that ive nicknamed "Schrodingers Villager", is when a Villager is put into a boat, and vanishes if you get too close to it.
HOW TO REPLICATE:
Create a New Superflat World, only changing the grass to be Blue Ice.
Get a villager inside of a boat, and put the boat onto a path in the village.
If the glitch is replicated successfully, the villager should disappear when you get too close, and reappear when you back up.
Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please create a new ticket.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki