Why Spawner Bug Fix is a top-tier mod mod for Minecraft 1.16.5
Fixes spawner Lag from bug MC-189565 for Endermen.
โ๏ธ Quick Resource Specs
| Mod Creator | MacTso |
| Latest Version | 1.16.5 |
| Supported Game Versions | 1.16.5, 1.16.4, 1.16.3, 1.16.2 |
| File Size | 61.89 KB |
| Last Updated | |
| Total Downloads | 12,817,689 downloads |
This *client* side mod addresses a bug which causes lag in mods that create custom spawners with endermen and when mapmakers or players use an endermen egg on a spawner. For example, Dungeon Crawl which we use in Two Guys Modpack creates endermen spawners.
Fixes this bug (except Evoker Fangs) which produces a lot of lag in 1.16.
https://bugs.mojang.com/browse/MC-189565
- Note: This bug is fixed in MC 1.17.
MC-189565 Description
Category: Performance, Rendering
Mob Spawners do not render a "mini" mob visual for the following entities:
- Bee
- Enderman
- Polar Bear
- Wolf
- Zombified Piglin
- Evoker Fangs
See attached images for expected (Elder Guardian) vs unexpected (Zombified Piglin). When the game attempts to render them but fails, it also produces an error message in the console over and over again, which can potentially cause a lot of lag in the world, especially when lots of spawners are used.
Patron Support
Spawner Bug Fix currently has no supporters so it is exclusively available on Curseforge and Github. We need your help and will credit you for supporting the mod! Currently, Regrowth, Vending Machines, Wireless speakers, Spider Fix and others are supported and available on alternative mod loaders.

You can join us on our Discord Server at the link below.
The Ultimate Guide to Spawner Bug Fix
If you are exploring the vast world of Minecraft modifications, Spawner Bug Fix by MacTso is a standout mod that deserves your attention. With over 12,817,689 downloads, it has become a staple for players looking to enhance their experience. As the creator describes it, this project is "Fixes spawner Lag from bug MC-189565 for Endermen.". Whether you are a veteran builder constructing massive cities, or simply a casual player looking to upgrade your survival world, this guide will provide you with all the essential details on how Spawner Bug Fix alters the game.
What Makes It Special?
Unlike standard mods that simply alter superficial elements, Spawner Bug Fix introduces a wide array of visual and mechanical features designed to seamlessly blend into the vanilla aesthetic. MacTso has clearly spent significant time refining the project to ensure that every aspect feels polished and responsive for version 1.16.5.
Installation Guide
Getting Spawner Bug Fix up and running is straightforward. Follow these step-by-step instructions:
- Verify Your Version: Ensure your Minecraft launcher is set to version 1.16.5.
- Install Mod Loader (if required): If this is a mod, download the compatible loader (Forge, Fabric, NeoForge).
- Download the File: Click the secure download button above to retrieve the official file from CurseForge.
- Move the File: Place the downloaded file into your `mods`, `shaderpacks`, or `resourcepacks` folder depending on the mod type.
- Launch and Enjoy: Open Minecraft, navigate to the respective settings menu, and activate Spawner Bug Fix.
Compatibility & Performance
Compatibility is robust. Spawner Bug Fix is designed specifically for version 1.16.5, taking full advantage of the latest engine optimizations. During typical gameplay, this addition maintains a stable frame rate, though lower-end laptops might experience slight stuttering. We recommend pairing this with performance boosters like Sodium or Iris to guarantee a silky-smooth experience.
