On the last new releases, I often get the preview pane even when I’m in the font view, and the buttons in the bottom bar become all jumbled and overlapped. See this screenshot, it explains it better than I do:
https://www.evernote.com/shard/s1/sh/95eb541c-5bf1-4585-bf67-1ac95dd8f0de/9b5c5dc8349 6738e4fac89729348e740
Restarting fixes it…