Sulfur is attached_node

mods/core/falling.lua

@@ -138,7 +138,7 @@ realtest.register_on_updatenode(function(pos, node)
 		end
 		if not check_attached_node(pos, node) then
 			minetest.env:remove_node(pos)
-			minetest.handle_node_drops(pos, {node.name})
+			minetest.handle_node_drops(pos, minetest.get_node_drops(node.name, nil))
 			nodeupdate(pos)
 		end
 	end

mods/ores/registration.lua

@@ -187,7 +187,7 @@ minetest.register_node("ores:sulfur", {
 	selection_box = {
 		type = "wallmounted",
 	},
-	groups = {cracky=3,drop_on_dig=1,dig_immediate=2},
+	groups = {cracky=3,drop_on_dig=1,dig_immediate=2,attached_node=1},
 	drop = {
 		max_items = 1,
 		items = {