One of my users reported a new problem that showed up this week that hasn't happened before. She on a phone call when someone outside the office transfers a call to her extension. That second call goes to voicemail like normal, but then the automated voicemail voice (from the transferred second call) starts playing over the audio of her original call. She ends up having to hang up then call the first person back to resume their conversation freely.
We haven't changed anything within our system recently. I checked the Forwarding Path information for her extension. The "Ring Principle Once" field is set to No, and Fwd Call Type - CO Transfer/AA/VM is set to "Yes", both as expected.
Where else can I look to find why she's getting audio feedback from a second call on her first call?