Emojis has become an important part of messaging but it looks like you might want to keep the emoji usage to a minimal when using WhatsApp because you might crash your app.
It has been reported that messages filled with too many emojis might cause the current version of the WhatsApp app to crash. It was reported that the problem only seems to exist on Android-powered devices.
According to The Independent, if you use the web version of WhatsApp to send a message that contains 500 emoji characters, the message will crash the app on Android device.
Once that happens, the only way to fix it will be to delete the conversation. There is no fix for the bug yet but the issue is not all that bad. If you are looking to get somebody to delete a conversation, this will be one of the ways you can force the person to delete it since the app will not be usable until the conversation with the emoji message is deleted.