PID question

Hi all,

I got a second hand pid for my new Citigo which I reset with Fresh and was running fine with the car.
Driving to work last night out of nowhere the total mileage, average fuel consumption and total time driving all reset to zero.

I didn't touch anything in the car and the odometer on the car and trip are unchanged.
It's rather annoying so I've ended up using the per trip information rather than long term.

Has anyone else had this and is there a way of getting the old values or really the total mileage back? I thought it was fed data from the ECU?

Thanks.
Jiff.