Arhelan

Hi, In the quest 'Whispers in the Dark' in the Stalwart Mines, I have killed the Radiant Spore in the cavern and returned to the mines. The journal tells me to report back to Foreman Ismey, but going into the Mines, I now find that all the miners, Ismey included, have turned hostile against me. Is this a known bug, or did I make some sort of stupid mistake that turned them against my Watcher?