Can't clear Monster Den in Northern Toussaint

[Dragon Blooded]

So, I've come across this Monster Den in Northern Toussaint (the one south of the swamp, between the Arthach Palace Ruins and Trading Post travel signs) that I can't seem to clear no matter what. It's the one where you end the Grandmaster Feline School gear quest. I've killed the Archespores inside it, but the icon doesn't grey out. Anyone else had this happen to them?

[s]

you didn't loot everything or the main chests in the cave

[Hoshikudaki]

If its the same monster den I'm thinking, I missed looting a dead body at first.