Before Continuing:

• Check you are using the latest version of the mods and its dependencies
• Always include a latest.log if you are crashing
• Remove known hacky mods such as: Optifine, Fabric API/Connector on forge, and every kind of hybrid server like Mohist and Velocity. None of these are supported. Also try without other lesser usual suspects like Sodium and Lithium.
• If you are unsure which mod is the culprit.
  Disable all of your mods and enable them 1-2 mods each time to isolate the culprit
• Confirm that there is no existing issue with a similar description submitted in the list of issues.

Version

1.21.1-NEOFORGE

Supplementaries Version

1.21-2.18.18

Moonlight Lib Version

1.21-3.1.7

Describe Issue

When trying to craft a flag with a banner pattern, neither of the inputs of the recipe are not consumed, allowing you to duplicate flags. This happens with both the flag -> banner recipe, and banner -> flag recipe. Further testing shows this also happens with the flag copying recipe too.

No additional mods were used when testing.

fixed