What you were expecting to happen, and what actually happened:
I expected the Hint to apply to the team provided for use. The Hint only applies to the enemy team (Crimson Bat)
How often does this happen? When did it begin happening?
Since Epic Trials was changed yesterday.
Steps to make it happen again
Open the Epic Trials in Ghulvania.
Merlantis has a similar issue, but for different reasons (it advertises Submerged, but for the current team it is only useful for Kharybdis’s boost ratio, when previously it was completely useless because there Merlantis has literally no troops that Submerged can protect you from).
At least they changed it so that it at least worked on some level and the hint applied to your chances of success in some way. In this one the only Life Stealing mechanic involves you converting Life from your own troops, which is not only counter to what the hint says but also detrimental to completing the trial at all and it wasnt that way before it was “fixed”.