After introducing a transporter into my system (previously using SB3)  I experienced random stopping
of play.  No rebuffering, just stopping.  Connection is wired.  Problem never occurred with SB3.

Found a hint somewhere that this could have to do with handshaking.  Default ethernet settings on Mac are  1000baseT, full duplex, flow control.    

If I manually change this to 1000baseT, full duplex (no flow control), the problem ceases.

Knowing this, it becomes a fairly minor inconvenience.  But most people would not know this.

This should be handled automatically at the Transporter end.  Failing this, the information should be easy to find.