Solver status awfully long before appearing

Hello there,

I am running a thermal analysis in Solidworks 2014 SP5.

The mesh runs smoothly but when I run the analysis, it takes long before to see the Solver Status window. I am used to see this window appears almost right away and then it could stay there for a long time. But what I see is a long time waiting for this window (time is relative, I would say 20 minutes) and then it stays there for only 2 minutes and it solves. I'm puzzled.

Is this a normal behaviour?

SolidworksSimulation