Describe the bug

Before installing Catalina, MacVim font looked fantastic when paired with Anonymous Pro (https://www.marksimonson.com/fonts/view/anonymous-pro).

Now however, everything looks very weird, like it's spaced out with extra pixels between each letter.

Here is before installing (I believe this was Mojave when I took this screenshot):

and here is after

Environment (please complete the following information):

• Vim version [e.g. 8.1.1234] (Or paste the result of vim --version.) latest mvim from homebrew --HEAD
• OS: [e.g. Ubuntu 18.04, Windows 10 1809, macOS 10.14] 10.15
• Terminal: [e.g. GNOME Terminal, mintty, iTerm2, tmux, GNU screen] (Use GUI if you use the GUI.) iterm 3