Bungie is “currently investigating” to determine “when it will return.”
Remember when Bungie postponed Trials of Osiris in Destiny 2 due to issues? The end-game PvP mode was scheduled to return on November 27th but was postponed again following another “recently discovered” issue. The developer is currently investigating with no estimate on when the mode could return.
Though it didn’t confirm the exact issue, many believe that a recent bug with the Titan Behemoth subclass to be the cause. As highlighted in this Reddit post, it allows the wielder to turn invisible to opponents and works for both Gambit and Crucible. Obviously this would be very game-breaking for a highly competitive mode like Trials of Osiris.
This is only another in a list of major issues that have plagued the game since Beyond Light’s launch, from the Shadebinder Warlock deleting raid bosses to Witherhoard dealing too much damage-over-time in Crucible. Bungie has been fairly quick in hotfixing things so it may not be longer before Trials is re-enabled. Stay tuned for more details in the coming days.
Due to a recently discovered issue, Trials of Osiris has been disabled for this week. We are currently investigating to determine when it will return.
— Bungie Help (@BungieHelp) November 27, 2020