HAHAHAH Wow! Umm that should probably not be happening... Do you happen to have a clip or a link to their stream so I can see what might be causing it?
Its happening just now again lol, her channel is https://www.twitch.tv/neettuber . She uses it for chat to play while she is sleeping since its a subathon. Its rlly weird it always happens in the same spot and seems to bug every other kart too. Here is a clip in case you miss it: https://clips.twitch.tv/TallBlushingAubergineBudStar-vSkIL38tk9WoIEDY
Alright got it! I'll make sure to fix this soon. I'll add an invisible wall on that side of the ramp and make sure races finish automatically if they take too long, in order to prevent any future bugs from fucking stuff up. I'll make sure to let you know when the new version is up. Thanks for showing me this. Never thought a ramp would make karts run off a cliff for 10 hours straight...