Hunting is in no way normal and should not happen, the valves stick sometimes but this is due to valve if yours hunts something is making valve operate. I will sort mine out just never really been bothered as run without ISCV at moment and otherwise runs fine.

I do notice on mine that it's fine once started, it was only when I tapped throttle hunting would start hence me saying check TPS output.

The actuator does not effect idle at all and does not "bounce" in and out.

Martin