The font preview window should be dynamic to fit the size of the text. When previewing large fonts, the text was outside the preview window.
There have been some recent changes in this area, can you try a recent version of inkscape to see if this still behaves in this way?
Bug watches keep track of this bug in other bug trackers.
There have been some recent changes in this area, can you try a recent version of inkscape to see if this still behaves in this way?