MeetMe - Conferences -- Silence after leader pin

I am using FreePBX distro and the free conferences module.

I have set up a basic conference with an admin pin for the leader, and no pin for the user.

When a user joins pre or post leader, all of the ‘proper’ messages are played.

When the leader enters there admin pin, if they are the first to join, the system sends no audio file, just dead silence.

Leader workflow

Dial Conference
enter pin
pin entered

Silence until first user joins.

Is this normal behavior? If so, is there a way to add the auth-thankyou or similar after the leader pin has been entered?