Use it If you Lag near an Heavy Villager Area(Is an Behaviour Pack so it's only available in Single Player)

If your Question Is why this Mod is behaviour pack Because of Bedrock engine limitations

This Villager AI Fix v1.0.2 mod for Minecraft 1.21.20 introduces the following technical changes and gameplay impacts:

Core Features

* Java Parity Search: Increases the search range for workstations to 48 blocks horizontally and 10 blocks vertically.

* Instant Resupply: Professional villagers are triggered to resupply their trades immediately upon arrival at their workstation.

* Strict Scheduling: Implements a precise 24,000-tick clock to transition villagers between work/play (0–12000) and sleep (12000–24000).

* Wander & Lag Fix: Includes a "Wander Fix" to prevent aimless exploration and is optimized to reduce entity lag.

* Profession Logic: Adds specific behaviors such as Librarians inspecting bookshelves and Farmers harvesting/composting.

Gameplay Impact

* Reliable Trading: Villagers are less likely to "lose" their workstations or fail to refresh trades due to the expanded 48-block detection range.

* Multi-Level Building: The 10-block vertical search height allows for efficient trading halls and houses with multiple floors.

* Village Safety: Improved navigation and strict bed schedules ensure villagers retreat and sleep consistently, reducing their exposure to nighttime mobs.

* Automated Farming: Enhanced "peasant" logic allows Farmers to manage inventories of bread and wheat more effectively for breeding.