I don't know if this is a glitch or a feature, but when you go to change the nickname on the part of the team builder where you can pokepaste, I noticed when you go to change the nickname, it turns bleach white, like on normal mode. I have no idea if this is intentional, but a oversight overall.
Edit: Ok, here's a image.
It only seem to happen when you select one of the premade name or past names that appear on the small white bar that appears when you click on the nickname bar. It only works that way. It'll stay black if you do it any other way, and you can only have it happen in the screen that allows you to validate and make a pokepaste.
Edit 2: I have b/w 2 sprites on, and I haven't tested it with other stuff.
Edit 3: Some more post images.
Edit 3: The only way to change the white is to close the teambuilder and re open it, then it will change back to black.
BUG STATUS: NOT A BUG, that's Chrome's autofill (DaWoblefet)