Version: 1.3 /e Car: Big Buzzing Bee Difficulty Level: Cool Played on Wine 7.4 through PlayOnLinux.
I've looked a bit further into that glitch from my previous Training run and it's the same glitch as was used here; It seems running into an object with uneven ground under it at a certain angle (though this doesn't seem to be super consistent) will cause the car to seemingly disappear. Most levels will just become unwinnable after this happens, but in at least Training, Slalom and Sabotage this causes the level to be completed early. I suspect it would work on Rallye as well, but I haven't found any objects that can cause this yet.
Also, while I highly doubt this is caused by Wine I still want someone with a Windows computer to try this and verify if it works there.