[SOLVED] Preferred Vertical Size not Working with Custom Bitmap Font

I have been using Content Size Fitter for my custom bitmap font with preferred horizontal size and it's been working fine, but I did not realise that the preferred vertical size was not working.

Any ideas why this is?

EDIT:
I solved this. The issue is that the preferred height does not include the line spacing. Definitely a bug, but I just wrote a tiny script to add the line spacing to the preferred height.