Hello Gazebo Community,

I was trying to control the shadow hand and when there is a cube on the hand, the thumb finger behaves weird after giving the command to the other fingers(index, middle, ring, pinky fingers)

What can be possible reasons such a behavior and How can I fix it ?

The cube mass is 8 gram and I also loaded the model .sdf file in case you might want to take a look at it .

Here is the youtube link video

Model SDF File

Thank you for your help