Why is a ? emoji showing up to iphone users?

[Android Central Question]

When i send this emoji in my whatsapp message to my iphone user friends, they see a plus a question mark inside a black diamond emoji. This doesnt happen when i send other emojis. This bothers me as it may send a wrong message to my friends...

Please help!

 

[anon(238680)]

Welcome to Android Central. Normally the question mark would mean the iPhone can't recognize the symbol or font for some reason. Nothing to be concerned about.

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