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

1.20.1-FORGE

Supplementaries Version

1.20-3.1.36

Moonlight Lib Version

1.20-2.14.14

Describe Issue

The slingshot, which can usually place shot blocks, treats the TNT both as a block and as a explosive, meaning when it lands it generates a TNT entity and also places a TNT block on top. This can be exploited to duplicate TNT in explosion resistant-fluids (like water), or to duplicate other mods' non-destructive explosives (like Oreganized's shrapnel bomb).