Simulation timing in gazebo ?

I have set the following condition in my world file. I want real time factor to be 1 so that both simulation and real time run at same speed. But when I launch the world file, real time factor decrease to 0.2 on gazebo screen. 0.0010001.0000001000.0000000.000000 0.000000 -9.800000 Does this mean that gazebo is not able to do the calculations, because of which it is reducing the real time factor, or is there any other reason ? PS :- Gazebo : 7.13.1 and Ubuntu : 16.04