Back to how it was before, when it was even working at all.

code/game/machinery/machinery.dm

@@ -120,7 +120,7 @@ Class Procs:
 	var/speed_process = 0 // Process as fast as possible?
 
 /obj/machinery/initialize()
-//	addAtProcessing() //Testing this in new conveyors
+	addAtProcessing()
 	. = ..()
 	power_change()
 
@@ -128,19 +128,11 @@ Class Procs:
 	if(use_power)
 		myArea = get_area_master(src)
 
-/*	machines += src
-	if(!speed_process)
-		machine_processing += src
-	else
-		fast_processing += src */ //Also testing in NEW conveyors
-
-/obj/machinery/new() //new for trying to get the conveyors working with machinery, not world
 	machines += src
 	if(!speed_process)
 		machine_processing += src
 	else
 		fast_processing += src
-	. = ..()
 
 /obj/machinery/Destroy()
 	if(myArea)

code/modules/recycling/conveyor2.dm

@@ -217,17 +217,17 @@
 		id = newid
 	update()
 
-/*	spawn(5)		// allow map load
+	spawn(5)		// allow map load
 		conveyors = list()
 		for(var/obj/machinery/conveyor/C in machines) //This works if it's: `C in world` , but that's bad practice. Best to try to fix it.
 			if(C.id == id)
-				conveyors += C */ //Moving this to initialise to see if it gets around the bug... do we need the spawn thing? Let's find out.
+				conveyors += C  //Moving this to initialise to see if it gets around the bug... do we need the spawn thing? Let's find out.
 
-/obj/machinery/conveyor_switch/initialize() //This whole thing is new
+/*/obj/machinery/conveyor_switch/initialize() //This whole thing is new
 	conveyors = list()
-	for(var/obj/machinery/conveyor/C in machines)
+	for(var/obj/machinery/conveyor/C in world) //This works if it's: `C in world` , but that's bad practice. Best to try to fix it so it's in machines
 		if(C.id == id)
-			conveyors += C
+			conveyors += C*/
 
 
 // update the icon depending on the position