When you are crafting make sure to click the "no" to keeping existing sockets, otherwise it will continue to stay 3 sockets everytime you craft
I spam dartle on demon spark, bitch please
If it started out 3 socket and kept the sockets while forging
all my gear was bought 3 sock when i reforged they auto went 4 sock never got 3 sock from reforge.
then you were lucky.. not all come out 4 socket