How do I install MMR Random Fix?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does MMR Random Fix work with?

The listing gives Minecraft 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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MMR Random Fix

Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.

by KuDikan · on CurseForge

⬇ Download on CurseForge

The author built this one for Minecraft 1.21.1 on NeoForge. On other versions it may install and then do nothing.

Open in MC Java Mods Get it on Google Play →

Multiblock Random Fix

This mod fixes two critical issues in Modular Machinery Reborn mod's multiblock preview interface:

Resolves "Accessing LegacyRandomSource from multiple threads" error that crashed preview interface.
Removes the 64-item stack limit, allowing required items to be displayed correctly.

Now you can browse multiblock preview interfaces without crashes or missing materials.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as mmrrfix-1.0.1.jar — drop this file into the mods folder
Download size: 5 KB
Download link checked 3 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21