Hello,
I experienced this bug now twice, but I don’t remember the exact circumstances when it occured the first time. Well, now it happened twice and this is how:
Short’y, before all bugs were fixed, I received an Inivitation to the G3. I accepted it and the convention what almost exactly at the same time I hit the ‘finish’ button. This means, that e.g., the hype bar was already ‘full’, but because the convention happened, it jumped higher and after that the game wouldn’t finish.
I hope this was helful and that you will fix this in future versions, because this time I think I did pretty good and now I can’t finish this run. 