There seems to be an issue with using Label::getLetter(int) in that it appears to be creating a duplicate letter for each character accessed with that method. Also, these duplicated letters appear with greater spacing. Issue occurs both with TTF and BMFont.
Edit: Tracked the bug down to setVisible() … ?? … we used setVisible to false on dialog appear and back to true for each letter in sequence for the animating in letters.
Workaround: We switched to using setOpacity instead to get the same effect without the duplicate letters. This is probably better as we’ll experience with fadeIn as well.