blockgame/mods/bg_api/fall_fix.lua

local entity = minetest.registered_entities["__builtin:falling_node"]



local original_try_place = entity.try_place
local after_land_callbacks = {}

entity.try_place = function (self, bcp, bcn)
	local result = original_try_place(self, bcp, bcn)
	-- `result` will be true if the falling node landed successfully (afaict from reading `/builtin/game/falling.lua` in the minetest source).
	if result then
		for _, callback in pairs(after_land_callbacks) do
			callback(bcp, bcn, self)
		end
	end
	return result
end

function blockgame.register_after_falling_node_lands (callback)
	table.insert(after_land_callbacks, callback)
end

blockgame.register_after_falling_node_lands(function (pos, node)
	local def = minetest.registered_nodes[node.name]

	if type(def.after_landing) == "function" then
		def.after_landing(pos, node)
	end
end)