Hey,
everybody knows this problem, I have solved it from the recipient-side already in this tutorial - BUT the way easier way to prevent a replay from being not watchable is a 10-seconds-thing for the builder:
If you know your track has a lot of MT in it and probably some blackscreens (remember: even if in the actual run the driver did not get a blackscreen, in the replay ANY blackscreen trigger will trigger!), just follow this one easy step to make an enjoyably watchable replay (in case you don't have an outro already):
1. Go to the outro menu and put an empty trigger at the start.
And that's it.