1st picture leaf finger Is on and one under near leaf stem I see holes definately some kinda bug damage. That doesnt mean that you dont also have a mag def.Apologies for the less than perfect photos guys. This is the best I can do. I've started treating the plants with neem oil in the past few days so if it's bugs hopefully that will sort it. But I just think there is a chance this is some kind of deficiency. Do these 2 new photos give you any better idea?