Issue with 2006 Jeep Liberty abs engaging prematurely

What is your question?

Several months ago I had all four wheels brakes redone on my 2006 Jeep Liberty. The front rotors were turned and pads replaced and the back wheels got new pads and a new rotor. Since that was done the abs brakes prematurely engage when braking at times. I have taken the liberty to the dealership three times and NTB twice and they can replicate the issue and but no one knows what is causing the problem. All parts have been checked and they cannot fine anything wrong. Abs light has not come on and there are no computer error codes.