My guess: Because the green box is rather small, UI Vision sometimes matches the area “Adm” as second “Colab” match. And the true 2nd “colab” is then third match (as it counts left to right, top to bottom… like reading).
Solution: You are correct that the green box must not contain changing parts like the employee number. But you can still make the green area bigger/more unique by adding a few more lines to it. That should make the matching more stable. Here is what I would try:
