No re-calc after editing fill-up

It seems that re-calculcation of l\100km (fuel consumption) value does not work properly:
I noticed that I missed one fill-up and added it (it got into the middle of my list), but fuel consumption in latest item didn't change. I opened that first item for editing and saved with no changes. Consumption value has been recalculated.
I think it should have been re-calculated after adding missed fill-up