KTM Duke 250 fuel indicator shows 0 range if there is less than 3 litres of fuel

So, my new Duke 250 fuel indicator shows 0 range whenever there is less than 3 litres (reserve capacity) of fuel in the tank? Is it the case with everybody or my fuel indicator has got a faulty sensor? Whenever my range drops below 100km (that means there is <3L of petrol which is reserve fuel for the bike), the fuel indicator instead of showing the range, shows 0 as range as shown in the pic. Fellow, Duke 250 Gen 3 riders, please let me know of this is normal or there is a faulty sensor on my bike? PS: I am trying to run on low fuel because I have to transport this bike via rail to another location in 2 days and the parcel guys need the tank to be empty.