Reverts the "fix" for MC-101556 (only affects 1.21.5).
Makes nether portals/chunk loaders work properly again.
Please note that the "fix" for MC-101556 was reverted by Mojang in 25w16a (1.21.6) and the mod is no longer required in these versions.
The mod itself is extremely minimalistic and only a single line of code was patched.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.5
- 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 Modrinth — 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.
Verified by MCModsHub
- Ships as revert-mc-101556-1.0.0.jar — drop this file into the mods folder
- Download size: 9 KB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.