Has anyone else had an issue after upgrading to 15.5sp2 where answering an incoming call on someone else's extension using a BLF key will break the extension? We see *20*extension on the display (Yealink T46G) but it doesn't pickup the call. After that you can make outgoing calls, but noone is able to dial your extension. I've tried deleting and re-creating the same extension, without success. I've tried the latest firmware 184.108.40.206 as well as reverted to older firmwares (220.127.116.11, 18.104.22.168) with no success. Tried signing in with 3cx client as softphone and any calls still go directly to voicemail.