Ah ! The manual event trigger can accept string objects, not number/decimal. But you can construct a random number into a string as I mentioned in another of your tickets I believe. And then use it in there = )

Hope that helps, if not let me know and I'll assist further

I'm afraid I've downloaded your map and tried your reproduce steps without encountering the issue. For me the script ran as it is setup in the editor. What puzzles me is that you said you did close and reloaded the map , so I should have had the bug too, but apparently not. If that still happen after the next patch however , I'd like to know :)

Upon loading the save file I could not replicate the issue, I rallied the minions and they all followed the flag, many using the moongate without issue.

And this map is probably pushing the limits of the game, so some computers will struggle.

That being said we have duplicate reports of minor issues with the moongate, so this will be looked at nonetheless in another ticket