There's an issue with Ambify v1.3 related to a recent change to the pairing process. It's supposed to make pairing easier but in some cases breaks things instead.
That said, the problem is fixed in v1.4 which should be out next week. In addition, there's a workaround to fix the issue immediately.
For those who are experiencing this issue, please create a ticket (or send an email) and you'll be instructed on how to get it fixed right away.