CurseForge · Minecraft mod

Spawner Bug Fix

Fixes spawner Lag from bug MC-189565 for Endermen.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Spawner Bug Fix release should I use?

Updated 1 year ago

Latest stable file SpawnerFix-1.16.2-1.0.0.3.jar

Game version 1.16.3, 1.16.5, 1.16.4

Loader Forge

Spawner Bug Fix SpawnerFix-1.16.2-1.0.0.3.jar targets 1.16.3, 1.16.5, 1.16.4 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Spawner Bug Fix required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say

Dedicated server Source doesn’t say

Loader for this release Forge

Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Spawner Bug Fix SpawnerFix-1.16.2-1.0.0.3.jar need?

SpawnerFix-1.16.2-1.0.0.3.jar. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Spawner Bug Fix without breaking your instance.

Built for Spawner Bug Fix SpawnerFix-1.16.2-1.0.0.3.jar. Pick another file and the loader, install side or required mods may change.

01
Stick to this file

Use SpawnerFix-1.16.2-1.0.0.3.jar. It targets 1.16.3, 1.16.5, 1.16.4 with Forge; another release may have different loader, side or dependency requirements.
02
Bring the mods it needs

This file does not list any required mods. Do not add a library just because a different file uses it.
03
Put it on the correct side

The project page does not say whether this file belongs on the client, dedicated server, or both.
04
Pick the file you checked

Use the “Get this file” button beside SpawnerFix-1.16.2-1.0.0.3.jar. It opens that exact file at the source.

About this project

What does Spawner Bug Fix add?

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.