P3D v3 Wheels turn for on ground AI aircraft not moving

#1
If I place my AI aircraft on ground, gear down, on ground flag set, I see sometimes the wheels turning even though the plane is not moving.
Sometimes this is not happening (steady wheels).

However, since there is not SimConnect parameter (AFAIK) to switch on/off turning wheel, I wonder what the root cause may be.
What parameter is affecting that?
 
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