I have come across this bug a few times throughout Mirage but haven't mentioned it until now.
When I enter a sigil and discover I'm facing a cheating boss, while in combat, I often flee to change my deck or get health. But when I teleport back, I often find myself having to redo the tower all over again—starting from the very beginning. This doesn't always happen but most of the time it does, and it is extremely annoying. Please fix this.
it's a good idea to check wiki on a boss dungeon before entering so you get a 'heads up' on cheats, etc. it's a time saver for sure keep your bottles full and read up on the boss first and you will be fine.