I have an unusual issue with my Yealink T38G's after the 18.104.22.168 update. They work fine, call internally and externally direct are good. The problem is if a call comes in off of a Queue there is no audio in or out. You can transfer from a non-upgraded phone from the Queue to an upgraded phone and it works, just direct off the Queue nothing. Not sure where to start. Ended up having to downgrade the phones.