Update on this one, the installation has now been upgrade to 3.1.4, but the issue still persist.
In summary a reload task is scheduled to run every 5 min, it has a timeout set of 1 minute, it's normal run time is circa 20 seconds.
At fairly regular intervals, the task stalls, no further details are written to the script log, until the Qlik sense engine is restarted. The stalled connection is causing issues in the Clients datamart.
Please help guys!!