AMS 5 Starter -Live RTMP stream freezes after short period of time

I am hosting a live RTMP stream using AMS 5 starter to test the solution prior to purchasing a standard license.  The stream is derived from a Haivision Makito.

The stream will freeze after an undetermined period of time; I believe a few hours.  If I restart the AMS server OR restart the stream from the encoder the stream will recover.

My test situation is a single swf client.

The solution otherwise works fine.

no on demand being used; just a single RTMP stream.