Mine does this too...always reports a fuel level of 9.5gal. Done it ever since I got it, I just assumed it was a bug in the app. Would be interested to know if there was a fix.
F82 M4 Coupe (Black Sapphire, Sonoma Beige)
Previous: F20 125d M E92 335i M Ind E90 325i SE E46 318i SE E36 316i