Streaming Issue - drops after a few minutes.

  I have a blackmagic extreme box connected via thunderbolt to an iMAC.  If i select to stream just video it works flawlessly, streaming just adio works flawlessly, but whenever I select video and audio - it disconnects within 3 minutes.  This is being streamed to my own AWS servers.  I have an event coming up this weekend, support would be greatly appreciated.  Whether I need a different capture device or its software settings.  Thank You