Since the update last week, our attended transfer is no longer working. The phones we have are Grandstream GXP2140, GXP2160, GXP2130 and GXP1710. The configuration was not changed at all before or after the update, but it just stopped working. The button comes up for AttTrans but when pressing it, the transfer is sent without calling the other phone and speaking to them first. Essentially, Attended Transfers are acting as Blind Transfers. Under Phone Provisioning in the pbx, we have "Attended/Consultative Transfer" selected under Select transfer method used. The phones themselves have "Dynamic" selected next to Attended Transfer Mode. Under Virtual Multi-Purpose Keys Settings, we have "transfer mode via VPK" set to attended transfer as well. I'm a little stuck figuring this one out. Any help would be appreciated!