[MC-153904] Villagers sometimes disappear without any trace

Moderator Note

Since 1.15, villager deaths are logged in the server console (see ~~MC-165985~~). Please check these logs before confirming this issue for new versions.

If you're experience this on Realms, make sure that in the "World options" screen, "Spawn NPCs" is enabled.

Mod Violine1101 mentioned in ticket ~~MC-150170~~ to make a new ticket for this, so here it is. Entire villages worth of villagers are disappearing on a fresh server hosted on my PC, absolutely 0 mods, and no spigot/paper stuff since I'm new to this. The only message I'm seeing of relevance in the server log is "[Server thread/WARN]: Fetching addPacket for removed entity." It occurs at about the right time according to the affected players. Nothing else has yet been reported missing, but it's a small server that we started yesterday. I attached the latest.log where you can see the message first pop up at around 11:17, which matches the player saying that the villagers he lives with have been gone all day. Let me know if I can add anything else to assist.

EDIT: The error message in question coincides with a night successfully being skipped by sleeping, according to the affected players. This seem possibly relevant.

EDIT2: While the above was true, other villager disappearances have occurred without sleep it seems.

EDIT3: As requested, world file: https://www.dropbox.com/s/z3f10h2ps9fen74/world.zip?dl=0