I've got the same bug, and also updated wet and cold, along with updates to deadly dragons and the unofficial dawn guard/hearthfire/skyrim patches. Things I've tried I went back a day and a half in save games and thought I got rid of the bug, but alas, no. I thought it was related to a buggy companion quest, and finished that by console so aela would leave as a follower, still no. I thought it was fast travel related, no again. I even tried traveling outside of whiterun hold, hoping the effect was somehow related to location, nope, still get the invisible npc at tne player home in falkreath. If anyone has any ideas, I'd love to hear them, this glitch makes the game unplayable