hi guys, anyone of LB Myvi owners encountered rapid dropping of "RANGE" reading when yur fuel runs low?

this afternoon my meter says it can still run 77KM before i run out of fuel, but after work, around 6.30pm when i start my car, it says i left 56KM i was like WTF?!?! The fuel bar was 2 bar when i left my car and it was blinking when im back after 3 hours. When i reach home, the reading was 49KM, and 2 hours later, when i was going out for dinner it dropped to 42KM!!

then i went back and ask my dad, he says he too found out that problem when he drove my car for the 1 whole week.

It only happens when the fuel is running low, anyone had this weird problem? I havent reach 1000Km yet, so i hope this is only temporary