Possibly an UPM size problem when reading DesignSpace+UFO of Roboto Flex

  1. Download the ZIP https://github.com/googlefonts/roboto-flex/archive/refs/heads/main.zip

  2. Unzip and from sources folder open RobotoFlex.designspace

When Glyphs 3.0.5 (3120) opens it, I get this:

(There is also a problem with rendering the master switching widget — it’s pushed to the very right of the window in a somewhat odd way.)