Is this by the chance happening in the sawmill in Driftwood after you stole the assassination contract from the sleeping mage?
For some reason stealing that one thing turns everyone in the sawmill clairvoyant and out for blood, and even dropping the said contract before you see the npcs does not help. Only reloading to the point prior to stealing it worked for me.
Beyond that I've no help to offer, unfortunately

. I've read that you could try to send your savegame to Larian and they may fix it for you, but given the post release bughunt, it may not happen fast.