Motor rotates uncontrollably after entered into closed loop

Sometimes motor rotates uncontrollable after enter into the closed loop control.This is happening 1 out of 10 times.My encoder mounting and all fine(no slip)…

Is there anything to do with calibration parameters like phase inductance and resistance??? Or any electrical parameters??

We are having this problem for past six month??
Can someone help me out?

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Are you using index search?

i am facing the same issue, yes i am doing index search.

Yes using use_index parameter.