Sodium Crash: ArrayIndexOutOfBoundsException: Render list is full

What it looks like in the log

java.lang.ArrayIndexOutOfBoundsException: Render list is full

How to fix it

1. Update Sodium to the latest version available for your Minecraft version on Modrinth or CurseForge, as the CaffeineMC team patched this overflow bug.
2. If you have Not Enough Crashes installed, remove it from your mods folder—it is incompatible with Sodium and leaves chunk render lists in an invalid state after catching an initial error.
3. Update any Sodium add-ons (such as Iris Shaders, Sodium Extra, or Reese's Sodium Options) so they match your updated Sodium release.
4. Restart the game and test the area with pistons or rapid block updates again.

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