Just had a game of trials with two of my friends. We lost round 1, and then won the next 4 rounds. As soon as we won the 4th round though my console froze and so did my friend acidvengence's. However, our teammate WARMAN012 didn't experience the issue. He said that they started teabagging and shooting his orb after each kill afterwards though, so I can't help but believe it was something malicious over an odd coincidence. It also counted as a loss which a normal disconnection wouldn't. Then again, simultaneous console freezing isn't disconnecting...
Gamertags of the suspected cheaters below
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Bungie takes cheating very seriously. The best way you can report suspected cheating to Bungie, is by utilizing the in game report tools: https://www.bungie.net/en/Help/Article/12960 Please note that I am removing the gamertags from your post.