How to use TearingScenarioEngine

[RickYang1]

I want to use TearingScenarioEngineto complete continuous tearing, I tested that by the following code：

int previousVertexCount= Tissue.GetMesh().vertices.Length;
while (true)
{
    if (Input.GetKeyDown(KeyCode.Space))
    {
        Vector3[] vertices = Tissue.GetMesh().vertices;
        int currentVertexCount = vertices.Length;
        if (currentVertexCount==previousVertexCount)
        {
            continue;
        }
        int farthestIndex = FindFarthestPointAlongDirection(vertices, startVertexId.Value, startDirection.Value, previousVertexCount);
        nbFractureMax.Value++;
        Debug.DrawLine(vertices[farthestIndex], vertices[farthestIndex] + Vector3.up * 2, Color.green, 50f);
        startVertexId.Value = farthestIndex;
        startDirection.Value = Quaternion.Euler(0, 10, 0) * startDirection.Value;
        previousVertexCount = currentVertexCount;
    }
    yield return new WaitForSeconds(0.02f);
}

However, when I pull the tissue or cut it too quickly, Unity crashes：
https://github.com/user-attachments/assets/c07e93b8-301d-4b34-bebd-5c1f9a93fc43
The crash log is as follows:
Editor.log
May I ask how to avoid this problem？
In addition, the parameter startVertexId of TearingScenarioEngine is the index of the midpoint of the tearing path. I want to use it as the starting point. Should I change line 447 of TearingEngine. inl to Pc=Pa?

Thanks in advance!