Although emojis are basically letters and ASCII symbols, it requires rendering support to display the emojis correctly. Some older devices may not be able to render the latest emoji icons correctly. To fix this issue, we provide an option to pick these latest emoji icons out in auto generating emoji link. The following emojis are pick out when "Take care of older devices in auto picking emoji link" is enabled.
It is normal if you cannot render these emojis if you are using older devices with old operating system. (e.g. Windows <= 8.1, Android <= 5.0, iOS <= 10)