Chat commands such as: /g for guild, or /t for trade will stop emote commands which contain those from working.
For example, using the /gg emote command will send the message 'g' to your guild chat instead. This doesn't happen on live servers either.
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Here is a gif of this happening: https://i.gyazo.com/f582d1edaee19681adc42f54fd59e416.mp4