Re-queue is not happening via Yealink phone

Problem : Re-queue is not happening via Hard phone
A) If an agent is rejecting the call through IWS then it automatically gets re-queued to the next available agent.
B) If an agent is rejecting the call via Yealink phone the call gets disconnected instead of the call being re-queued

Please help…

Regards,
Sarwar Ali

Which steps did you do in investigate? What says SIP logs,release reason was? Do not create topics like this,without any deep description about your steps in investigate.