1) Type something random in Writer, or in an Impress or Draw textfield
2) Select your text
3) Right-click to open the context menu
4) Go to Font
5) Try to scroll to the end of the list
When this list is long, like in my case on a fresh install of Linux Mint with on top ttf-mscorefonts installed, the last fonts by alphabet don't show up in the menu any more.
I didn't test it right now, but I remember to have seen this bug already years ago in an OpenOffice installation (Windows).
Actually, in order to improve productivity, it would be nice to have a scrollbar for this font list anyway, cause navigation through a long list of fonts is not very efficient in the moment.
*** This bug has been marked as a duplicate of bug 34085 ***