Hi @madicke mbaye,
I apologize for the inconvenience. I tried to reproduce the issue with the voice fr-FR-VivienneMultilingualNeural, and it is now working as expected.
I understand the urgency and appreciate your patience. If the issues persist, consider evaluating alternative services to ensure your business needs are met. If you continue to experience problems, please let us know, and we will escalate this issue to the concerned team.
Thank you for your understanding.
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