Lyxen
Great Old One
I don’t care about metagaming, so that’s not a problem for me.
Where do the rules say that?
"When you try to hide, make a Dexterity (Stealth) check. Until you are discovered or you stop hiding, that check's total is contested by the Wisdom (Perception) check of any creature that actively searches for signs of your presence."
So it's when the creature tries to hide, not when someone is trying to find them.