Had a quick look at it this morning. There is a stand up leaf target under the wire but probably 10mm lower but it's colliding with that still.
Lets say the leaf target's name is "Target1", you can try this hotfix (in the script initialisation, in "PrepareElements" for example):
{ Vector3 tmp = GameObject.Find("Target1_animated").GetComponent<BoxCollider>().center; tmp.y += 10f; GameObject.Find("Target1_animated").GetComponent<BoxCollider>().center = tmp; }
This should decay the box collider associated with your target 10 mm down (be carefull: += not -=).
For the next UP release, you should not need this because targets will use the FPM collision shapes...