Why is the UITextField placeholder text decreasing in size?

I have a peculiar problem in Interface Builder with placeholder text. Some of the placeholder text is smaller than the rest and I can't find a reason why. When I duplicate a UITextfield with full-sized placeholder text it changes instantly to a smaller font.

Xcode 6.1.1 Mac OS X 10.10.2

Image would be attached if I had a 10+ rep.