Indeed, in the game on November 22nd, the Canadiens were in Anaheim to face the Ducks. The game ended with a score of 4-3 for the Habs, but it should have been 5-3.
According to Michel Laprise of RDS, Sean Monahan shot the puck into the home team's net at the end of the game, with 0.3 seconds remaining. The goal was never counted, but it should have been valid.
This error has no impact on the result, and Sean Monahan probably slept well regardless. However, there is another reason why this is quite serious.
With the increasing prevalence of sports betting, the final score of games is one of the factors people can bet on. Now, imagine the impact of such an error on the final score of a game.
In defense, it appears that the league reviewed the sequence and confirmed that the game was indeed over. However, as Laprise mentions, the green light at the end of the game behind the net was not on. Let's just say it raises a lot of suspicions.
