Emojis in a game's title don't show up properly when sharing a game in Twitter

[XAXA]

When tweeting a game, emojis in the game’s title are escaped (e.g. 💕 turns into 💕)

How to reproduce:

1. Go to a game with emojis in the title.
2. Click the tweet button that’s right below the like/dislike bar in desktop.
3. In the tweet’s body, emojis (and possibly other non-ascii characters?) are escaped when they shouldn’t be.

I am using Firefox on Windows 10.