Letter 🅱️ prints as ¥ in MacVim (but not in terminal Vim or less)

Try typing 🅱️ (or opening a text file with that in it) in MacVim. It will display it as ¥.

If you inspect the character with :ascii you see it is the correct character in the status line, albeit it displayed as the text version of the emoji. Writing the file correctly writes it as 🅱️, it just displays as ¥.

Opening it with Vim on Terminal.app displays it correctly, as does with less.

Here's my MacVim version

VIM - Vi IMproved 8.1 (2018 May 18, compiled Aug  8 2018 18:09:39)
macOS version
Included patches: 1-235
Compiled by Homebrew

I use font Menlo.

Here's my Vim version (it's the same one)

vim --version
VIM - Vi IMproved 8.1 (2018 May 18, compiled Aug  8 2018 18:09:39)
macOS version
Included patches: 1-235
Compiled by Homebrew

I'm running on macOS High Sierra version 10.13.6 (17G65).

Empieza reproduciendo el problema de visualización en MacVim en macOS High Sierra con la fuente Menlo y, después, compara el mismo emoji en Terminal Vim y less. Usa :ascii y un archivo guardado para verificar que el carácter sigue siendo correcto; se considera terminado cuando 🅱️ se muestra como el emoji en lugar de ¥ sin cambiar el carácter escrito.