CM11 icons watermarked on stock firmware!

Hi, everyone, I have a very unusual issue .. A friend with a Galaxy Note (N7000) that has CM11. I have flashed it with stock firmware (Android 4.1.2) but when I see, there are marked the old icons, keyboard and some other things of the previous firmware! O_O they are like a watermarks .. What is that? Is a display issue or a motherboard problem?

I did a full wipe .. (System, Data, Storage, Cache, Dalvik, etc.). but it's the same

Thank you :)