whatsapp sandbox sending sms instead of whatsapp message

[emorissettegregoire]

Hi,
I connected the gem to my bot. When I send a message through the message bird WhatsApp sandbox my bot replies back through SMS. Does the WhatsApp sandbox have any country restrictions?

The whatsapp sandbox is well initiated here:

@messagebird_client.enable_feature(MessageBird::Client::CONVERSATIONS_WHATSAPP_SANDBOX_FEATURE)
 => "https://whatsapp-sandbox.messagebird.com/v1/"

Thanks a lot for helping!