mfd error

This afternoon I noticed that the overall avg. mpg and driving time figures had reset. I haven’t pressed any of the buttons on the display so not sure why this has happened. However, none of the milage counters have reset. Do the counters automatically reset at a certain figure?

run the van to empty, filled up with fuel and not registering, still showing gauge empty and 0 range, any ideas. Please as I know I put the fuel in?