Emojis using Zero Width Joiner show up as multiple emojis
As reported by urbec on IRC.
In xfce4-terminal 1.0.4 for example blackbird
🐦 ⬛ shows up as🐦 ⬛ (Bird and Black Large Square) and Face with Spiral Eyes😵 💫 shows up as😵 💫 (Face with Crossed-Out Eyes and Dizzy) The font used is Noto Color Emoji. One example for a terminal emulator showing both properly is kitty 0.26.5