title. If something is inserted (though this should be impossible, bad other mods can cause this), it doesnt check the current slot against the generated block. inserting an item might be a better option (though requires more processing) or at least checking the slot against the generated blockitem.
https://github.com/lucaargolo/kibe/blob/5ee52f3a3cf7e05dbacb086ea3e79135c3528b53/src/main/kotlin/io/github/lucaargolo/kibe/blocks/miscellaneous/BlockGeneratorBlockEntity.kt#L98
title. If something is inserted (though this should be impossible, bad other mods can cause this), it doesnt check the current slot against the generated block. inserting an item might be a better option (though requires more processing) or at least checking the slot against the generated blockitem.