Talk:Underground Treasure Chest 5/@comment-27543772-20160801172639/@comment-24.130.112.187-20160803030051

They usually don't but special underground treasure chest events will reset. The one in May did --> http://touken-ranbu.wikia.com/wiki/Underground_Treasure_Chest_-_Easy_2

Thankfully the events that go to floor 100 don't do a reset in progress.