FaceTime Mac to Mac - no incoming caller video

Hi,

I have been experiencing the following issue with Mac2Mac FaceTime calls: the incoming video call comes without video itself. The caller do see himself on his camera as well as myself, but I do not see him. Once he switches to Mac2iPhone call, I do see his video. Did anyone experience the same issue and what was the solution? (both OSs are uptodate, no hardware issues or WiFi connectivity|throughput problems).