Bug / Crash Rope is moving wen increasing his length

[lufydad]

Hi,

I wanted to increase the length of a rope toward a maximal length. I used a code based on manual :

Code:

void Update()
{

    if (_obiRope.restLength <= _lengthMax)
    {      
         _obiCursor.ChangeLength(_obiRope.restLength + 0.2f * Time.deltaTime);
    }
    else
    {
         Debug.Log("Can't increase more");
    }
}

However, in runtime I observed a weird behavior : https://imgur.com/a/geSDfoW. The length of the rope is increasing, but at the same time the rope is moving in the direction of the cursor.
Is there anything I'm doing wrong ?