Here is my setup:
- User A: iPad Air, iOS8
- User B: (1) iPad Air 2, iOS9, (2) MBP 15", El Capitan
FaceTime between User A <-> User B (1) works just fine. When FaceTime video call is initiated between User A <-> User B (2) (same network, same time, can be just after first call is finished) this is when problem starts.
User A all of a sudden can hear his own voice echoing in his speakers and garbled a lot to the point where it's almost impossible to have two way conversation. User A can hear voice from User B just fine in both cases.
Any ideas what's going on here? I have a suspicion that it started with El Capitan upgrade but I can be wrong. The craziest part is how changes in User B environment can affect User A side of communication.