I'm trying to pass parameter via m.me link but for some reason it doesn't work. The webhook I get from the server doesn't contains the "referral" field.
I tried to re-subscribe to the web hook but it didn't help. A video with the full flow of sending the parameters and the webhook response - http://g.recordit.co/XShDj1Rx29.gif
It turned out that if the page is unpublished the referral field parameters are not passed in the webhook.
Publishing the page solved the problem
