We have recently upgraded to certified/13.8-cert4 as well as 14.1.2 (several servers). On both versions we found that we would get 1-way audio when phones were in a queue, however, when they are called directly audio worked as expected. We resolved the queue issue by setting the dtmfmode to “inband” (it was “rfc2833”).
Everything seemed fine, but now if a device is using “inband” and the user tries to change their voicemail password asterisk becomes unresponsive, which requires a reboot. Switching back to “rfc2833” fixes this problem, but reintroduces the queue issue.