So in 6 months or so my arms increased by 2 inches from 14.4 to 16.5. Of course a bit of it was fat, but most of it was muscle. Yet in the next 3 or 4 months my arms are still at 16.5, despite me doing the exact same things as before. I know muscle growth slows down but it’s literally exactly the same as it was 3 or 4 months ago. I’m still gaining weight and eating enough protein, so why is this happening?