Mike,
Thanks for the detail. I had no idea that 5000 translated to 1 second of delay. No wonder I have to use such a low feed rate for my probe script.
I'm using a Hitachi router. How about you? The bit of that router is grounded to the 110V circuit. I did have an anomaly once. I changed the power strip to a defective or otherwise different unit, and my ground went away. I changed the strip back, and my ground returned. Take an ohm meter from your bit to the 110V ground plug. If you see continuity, you need to change out your extension cord/power strip/or check your shop's circuit ground.