UPDATE: This issue has been resolved. Emojis will now be stripped from leads submitted via POST to the API endpoint.
We are currently experiencing an issue with the API and submitting leads via POST that contain emojis. If a lead is sent via POST to the Unbounce API and there is an emoji character contained in any of the fields the lead will not make it through to our database. Unfortunately leads that are lost due to this issue cannot be recovered.
We are currently working on a fix for this bug and hope to have the issue resolved as soon as possible. For the time being emoji characters cannot be submitted via the Unbounce API.
Apologies for an inconvenience.