I recently reset an Event objective to start the weekly challenge. When the challenge start, it immediately reset again without me pressing anything, and said "failed". After I restart the game and went back into the objective selection, I could no longer do the challenge. This isn't the first time the game has blown up on reset, but this is the first time that it's forced me to fail a challenge objective. The bug should probably be looked into, and I don't like losing my challenge tokens!