Wind observation error with inbuit simulator

Hello,

I have a doubt… I have plotted the Wind observed by ArduPlane with inbuilt simulator and JSBsim FDM. I ploted both of them but the wind observed by inbuilt simulator is not the right value… also it changes with steps which is undesired behavior.

IMPORTANT:
The wind observed is a right value when I run only inbuit simulator with the following command(without JSBSIM)

sim-vehicle.py --console --map