We need a change to the beetle mechanics so that once your endurance is maxed it can't be lost until you boost.
This isn't exactly a "bug" but it is a needless hindrance that can really mess up a beetle race time without warning. When you try to use your boost, if you are even slightly airborne through a small unexpected bump, the game "thinks" you are trying to do the air trick to regain endurance. This has a punishment mechanic where if you don't do it a certain way you lose endurance. There's no reason to punish players, though, for "failing" a trick when their endurance is full, because there's no reason for them to be trying to do the trick in the first place, and it's far too easy to accidentally be airborne when you try to boost. Then you not only don't get the boost off when you needed it, but you also get delayed even further by the endurance loss.
Compounding the issue you're probably mashing the boost trying to get it to go off and you therefore lose endurance a couple of times over the bumps. Just change this so that you can either boost in midair, or you can't lose endurance until you boost.