LogFAQs > #976341516

you could make the argument that it should intentionally work that way for balance purposes. To make it more difficult to hold onto to it for a long time, and to give it an explicit downside to counteract its usefulness (so it's an actual strategy to sacrifice your boosts to hold onto to it for the most difficult sections of the track, and if you do that for too long you're actually losing more time than you gain because you're boosting less).