I can't believe you have bought another Maurelii......how many is that you have now 200????
Its almost like Fasciation ( spelling) that you get on the odd plant.
Was it a two tone green variegation that grew out or white/cream?
I see the label is a B&Q how is the variegated one from Urban Jungle doing?
My two tone green one out grew the slight variegation that it had. I did wonder if it was lacking in feed at the nursery and with us feeding them it simply perked up.....sometimes Bananas can be very confusing