The custom font is sometimes not being loaded. I think this is caused by having a space anywhere in the path to the font. In the log below the space is in the name of my user folder.
INFO: Could not load @font-face font [file:/C:/Users/Austin%20Shalit/Documents/GitHub/GRIP/ui/build/resources/main/edu/wpi/grip/ui/roboto/Roboto-Regular.ttf]