Ever since upgrading past 1.6.6 I've had problems when using the originate command.

I'm unable to hear ringback on the call and no channel_progress ESL event is emitted when the "183 Session Progress" message comes back from my SIP provider.

Once the call is connected I can talk as usual.

Here are the console outputs; 

1.6.6 (working)

1.6.9 (no ringback)

Thanks in advance