Some Emojis are rendered in black and white (as Unicode)

Per Mismatched emojis - #2 by heymarkreeves this is happening in the desktop app. Is that rendering using a browser engine? That distinction is going to be lost on most users. There’s an iPhone app and a macOS app, and what works on one isn’t working on the other. Note that Discourse’s emoji picker swaps entered symbols for its own.