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).

先使用 Menlo 字体在 macOS High Sierra 上的 MacVim 中复现显示问题，然后在 Terminal Vim 和 less 中比较相同的 emoji。使用 :ascii 和一个已保存的文件来验证字符仍然正确；当 🅱️ 显示为 emoji 而不是 ¥，且不更改写入的字符时，即表示完成。