Bug on end tournament event - not saving game

Tournament lichess.org/tournament/qLURKy44
game lichess.org/5EQLo6W2#70
the mate was in exactly same second as tournament end and this game neither counted in league for a team, nor in my history.
it seems to be a race condition bug and depends on time - get back point to the team and history to myself.

Games have to end before time runs out in a tournament to make it count.
Since you said that it happened at last second it could have been slight on other side by millisecond and hence not counted as per rules.