Font Size Jumps to 72 and won't do 48

Font Size Jumps to 72 and won't do 48

I am trying to set my Heading on note to 48. As soon as I start to type it automatically Jumps to 72 and when I try to put back to 48 it jumps right back to 72.
It's not letting me do any other size in the text body than 34 (or 32? 36?) When I change it to 24 it jumps right back to 34.