diff --git a/mods/ENTITIES/mcl_boats/init.lua b/mods/ENTITIES/mcl_boats/init.lua
index fb5e19ae45..01457c4bba 100644
--- a/mods/ENTITIES/mcl_boats/init.lua
+++ b/mods/ENTITIES/mcl_boats/init.lua
@@ -85,11 +85,12 @@ function boat.on_rightclick(self, clicker)
 			{x = 0, y = 3.75, z = -1}, {x = 0, y = 0, z = 0})
 		clicker:set_properties({ visual_size = driver_visual_size })
 		mcl_player.player_attached[name] = true
-		minetest.after(0.2, function(clicker)
-			if clicker:is_player() then
-				mcl_player.player_set_animation(clicker, "sit" , 30)
+		minetest.after(0.2, function(name)
+			local player = minetest.get_player_by_name(name)
+			if player then
+				mcl_player.player_set_animation(player, "sit" , 30)
 			end
-		end, clicker)
+		end, name)
 		clicker:set_look_horizontal(self.object:getyaw())
 	end
 end
diff --git a/mods/ENTITIES/mcl_item_entity/init.lua b/mods/ENTITIES/mcl_item_entity/init.lua
index f3e02a0c3c..4c956af2fb 100644
--- a/mods/ENTITIES/mcl_item_entity/init.lua
+++ b/mods/ENTITIES/mcl_item_entity/init.lua
@@ -115,7 +115,8 @@ minetest.register_globalstep(function(dtime)
 								if object:get_luaentity().init ~= true then
 									object:get_luaentity().init = true
 									minetest.after(1, function(args)
-										local player = args[1]
+										local playername = args[1]
+										local player = minetest.get_player_by_name(playername)
 										local object = args[2]
 										local lua = object:get_luaentity()
 										if player == nil or not player:is_player() or object == nil or lua == nil or lua.itemstring == nil then
@@ -136,7 +137,7 @@ minetest.register_globalstep(function(dtime)
 										else
 											enable_physics(object, object:get_luaentity())
 										end
-									end, {player, object})
+									end, {player:get_player_name(), object})
 								end
 							end
 						end
diff --git a/mods/ENTITIES/mobs_mc/1_items_default.lua b/mods/ENTITIES/mobs_mc/1_items_default.lua
index f7f7c2c0b2..f705b78261 100644
--- a/mods/ENTITIES/mobs_mc/1_items_default.lua
+++ b/mods/ENTITIES/mobs_mc/1_items_default.lua
@@ -570,7 +570,8 @@ if c("totem") then
 						scale = { x=17, y=17 },
 						offset = { x=0, y=-178 },
 					})
-					minetest.after(3, function(player)
+					minetest.after(3, function(name)
+						local player = minetest.get_player_by_name(name)
 						if player and player:is_player() then
 							local name = player:get_player_name()
 							if hud_totem[name] then
@@ -578,7 +579,7 @@ if c("totem") then
 								hud_totem[name] = nil
 							end
 						end
-					end, player)
+					end, player:get_player_name())
 				end
 
 				-- Set HP to exactly 1
diff --git a/mods/HUD/awards/api.lua b/mods/HUD/awards/api.lua
index 4fdab6fbf6..09f9291768 100644
--- a/mods/HUD/awards/api.lua
+++ b/mods/HUD/awards/api.lua
@@ -338,12 +338,16 @@ function awards.unlock(name, award)
 			alignment = {x = 0, y = 0},
 			direction = 0,
 		})
-		minetest.after(3, function()
+		minetest.after(3, function(name)
+			local player = minetest.get_player_by_name(name)
+			if not player then
+				return
+			end
 			player:hud_remove(one)
 			player:hud_remove(two)
 			player:hud_remove(three)
 			player:hud_remove(four)
-		end)
+		end, player:get_player_name())
 	end
 end
 
diff --git a/mods/ITEMS/mcl_jukebox/init.lua b/mods/ITEMS/mcl_jukebox/init.lua
index 6ae5dbdfd2..2ee8f8c113 100644
--- a/mods/ITEMS/mcl_jukebox/init.lua
+++ b/mods/ITEMS/mcl_jukebox/init.lua
@@ -72,8 +72,8 @@ local function now_playing(player, track_id)
 		active_huds[playername] = id
 	end
 	minetest.after(5, function(tab)
-		local player = tab[1]
-		local playername = player:get_player_name()
+		local playername = tab[1]
+		local player = minetest.get_player_by_name(playername)
 		local id = tab[2]
 		local seq = tab[3]
 		if not player or not player:is_player() or not active_huds[playername] or not hud_sequence_numbers[playername] or seq ~= hud_sequence_numbers[playername] then
@@ -83,7 +83,7 @@ local function now_playing(player, track_id)
 			player:hud_remove(active_huds[playername])
 			active_huds[playername] = nil
 		end
-	end, {player, id, hud_sequence_numbers[playername]})
+	end, {playername, id, hud_sequence_numbers[playername]})
 	
 end
 
diff --git a/mods/ITEMS/mcl_portals/portal_nether.lua b/mods/ITEMS/mcl_portals/portal_nether.lua
index 637c0e8567..1c1f677421 100644
--- a/mods/ITEMS/mcl_portals/portal_nether.lua
+++ b/mods/ITEMS/mcl_portals/portal_nether.lua
@@ -404,6 +404,9 @@ minetest.register_abm({
 					end
 					-- teleport the object
 					minetest.after(3, function(obj, pos, target)
+						if not obj:get_luaentity() then
+							return
+						end
 						-- Prevent quick back-and-forth teleportation
 						if portal_cooloff[obj] then
 							return
diff --git a/mods/ITEMS/minetest-3d_armor/3d_armor/armor.lua b/mods/ITEMS/minetest-3d_armor/3d_armor/armor.lua
index b765820535..4dfa92e836 100644
--- a/mods/ITEMS/minetest-3d_armor/3d_armor/armor.lua
+++ b/mods/ITEMS/minetest-3d_armor/3d_armor/armor.lua
@@ -292,11 +292,15 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 	for field, _ in pairs(fields) do
 		if string.find(field, "skins_set") then
-			minetest.after(0, function(player)
+			minetest.after(0, function(name)
+				local player = minetest.get_player_by_name(name)
+				if not player then
+					return
+				end
 				local skin = armor:get_player_skin(name)
 				armor.textures[name].skin = skin..".png"
 				armor:set_player_armor(player)
-			end, player)
+			end, player:get_player_name())
 		end
 	end
 end)
@@ -406,9 +410,13 @@ minetest.register_on_joinplayer(function(player)
 		end
 	end
 	for i=1, ARMOR_INIT_TIMES do
-		minetest.after(ARMOR_INIT_DELAY * i, function(player)
+		minetest.after(ARMOR_INIT_DELAY * i, function(name)
+			local player = minetest.get_player_by_name(name)
+			if not player then
+				return
+			end
 			armor:set_player_armor(player)
-		end, player)
+		end, player:get_player_name())
 	end
 end)
 
@@ -435,7 +443,7 @@ if ARMOR_DROP == true or ARMOR_DESTROY == true then
 		end
 		armor:set_player_armor(player)
 		if ARMOR_DESTROY == false then
-			minetest.after(ARMOR_BONES_DELAY, function()
+			minetest.after(ARMOR_BONES_DELAY, function(pos, drop)
 				local node = minetest.get_node(vector.round(pos))
 				if node then
 					if node.name ~= "bones:bones" then
@@ -461,7 +469,7 @@ if ARMOR_DROP == true or ARMOR_DESTROY == true then
 						armor.drop_armor(pos, stack)
 					end
 				end
-			end)
+			end, pos, drop)
 		end
 	end)
 end
diff --git a/mods/PLAYER/mcl_hunger/hunger.lua b/mods/PLAYER/mcl_hunger/hunger.lua
index 72464320ea..d77a7b1874 100644
--- a/mods/PLAYER/mcl_hunger/hunger.lua
+++ b/mods/PLAYER/mcl_hunger/hunger.lua
@@ -85,9 +85,10 @@ local function reset_bars_poison_hunger(player)
 end
 
 -- Poison player
-local function poisonp(tick, time, time_left, damage, exhaustion, player)
+local function poisonp(tick, time, time_left, damage, exhaustion, name)
+	local player = minetest.get_player_by_name(name)
 	-- First check if player is still there
-	if not player:is_player() then
+	if not player then
 		return
 	end
 	local name = player:get_player_name()
@@ -97,7 +98,7 @@ local function poisonp(tick, time, time_left, damage, exhaustion, player)
 	end
 	time_left = time_left + tick
 	if time_left < time then
-		minetest.after(tick, poisonp, tick, time, time_left, damage, exhaustion, player)
+		minetest.after(tick, poisonp, tick, time, time_left, damage, exhaustion, name)
 	else
 		if damage > 0 then
 			mcl_hunger.poison_damage[name] = mcl_hunger.poison_damage[name] - 1
@@ -236,7 +237,7 @@ function mcl_hunger.item_eat(hunger_change, replace_with_item, poisontime, poiso
 						end
 						mcl_hunger.poison_hunger[name] = mcl_hunger.poison_hunger[name] + 1
 					end
-					poisonp(1, poisontime, 0, poison, exhaust, user)
+					poisonp(1, poisontime, 0, poison, exhaust, user:get_player_name())
 				end
 			end