Bug Report: Your displayed power level and the actual power level used when the dungeon is explored are different. The game doesn't take into account milestone upgrades, making the actual power calculation WAY lower than your displayed power. This leads to way more unit losses and a much higher failure rate than displayed.

So if your survival risk is NONE but you keep losing units, or your success rate is 95% but you keep failing when you explore, this is why.

(I'd report this on itch but I don't have an account and don't want to make one)