I have played with most of the settings and it just is not behaving consistently. Sometimes it shows failed, sometimes successful, sometimes safe mode triggered. The action of the probe is all over the place it moves sometimes a small amount and sometimes up to the inside of the recess. It does not appear to trigger if it reaches it.
I will make a small video so you can see what happens. The recess is a ring on my vice and it is loose so the probe does not get destroyed. I have held it in my fingers if the probe approaches it. I will post on Youtube as a private video so you can see it.
John