Mod Loader (Required)

Fabric

Minecraft Version(s) (Required)

1.21.1

Mod Version(s) (Required)

21.1.0

Other Mods Involved (Required)

Yes

Notes (Required)

Inconsistent mechanic compare to vanilla's. Iron block should be not consumed when you repair anvil with it in creative mode

latest.log (Required)

not a crash

I tested again and now everything works properly...
My bad probably, I'll reopen the issue if this happen again