tip labels not showing up when I use geom_tiplab

[Daniel Ence]

Hi, I have a tree with tip labels but none of my tip labels show up when I use geom_tiplab. I've read through Chapter 4 of the book, and looked at the FAQ A.4.1. Since I have no tip labels and not truncated tip labels, I don't think FAQ A.4.1 applies. I also tried different layouts and changing the size param in geom_tiplab and nothing shows up. 

Looking in the Data pane in Rstudio, I can see that there are labels in circ$label, and circc$isTip seems to be correct too.