yes, i tried it with fane at first then i tried with lohse, trying henchman just now and still the same..
the dark mirrors i don't think i passed the persuasion check, i did interact with it every time i kill some black ring just to make sure no dialogues missed. but really weird if it also makes Windego hostile.. that just doesn't make any sense.
i think i wont be able to revert the hostile because something must've made it hostile when i entered the cave at the first time so i cannot re-generate the map.
im pretty sure it must be something with the "first-time-map-generate" thingy