Hm, well, hmmm.
I do see why you want that option. Rematch with same teams, or rematch with random teams.
But I suspect the cause is another. Not sure if I am right, so can you please provide both game links.
(I wonder if the templates equal the gamesettings, when it comes to the players. And wheter there is a save template there or custom)
In fact the Rematch button is a bit funky at times.
This 3v3 game: https://www.warlight.net/MultiPlayer?GameID=12917064
the rematch currently gives one player invited and 5 empty seats. As an example. That is because that is what the template has.
Anyway, Fizzer did talk about something similar to this on one of the streams. Whether a rematch should use the template OR current game settings for example. (The template may change, whereas the current game does not)
That is Uservoice.
Edited 2/15/2017 03:26:55