Necromancer – “Invasion” [Campaign 3, Mission 3]

Same problem, the mage stands in the passage and doesn't move. Moreover, on the second day, he appears there and doesn't move. It takes me about 3 days to get to that place; it's the second month, third week, fifth day, and that jerk hasn't moved from that spot even once. Maybe someone else remembers how to get past it?! Added after 1 hour 45 minutes Figured it out :) He leaves that spot for about 3 days somewhere near the end of the first week.