Seeing as how this is the second time I've seen this happen, maybe there should be a rule in place to handle late race starts. Such as:
If a race doesn't start at the scheduled time, once the problem is fixed, the next start times are exactly 1 hour, 2 hours or 3 hours past the start time. If it staill hasn't started by then, it will be run the next scheduled race day, with all other races bumped back 1 day.
That way we don't all have to sit and watch the forum so we don't miss the race. Just check in at those times.
Do you know what lap your race got to originally? It should resume from where it left off. If it doesn't, then there may be another problem although it almost certainly is linked to this one.
I resumed all of the races a minute ago but stopped them again. Hopefully it restores from the correct point in the race when I start them all properly in a minute.