Board Thread:Skyrim/@comment-134.220.187.6-20171008151549/@comment-2A00:23C4:C875:B400:AC10:50E6:B23D:AACC-20171023215137

The issue was caused by the recent update, the common consensus over at Beth.net is that you just need to punch him to slowly chip his Heath, tried it myself and it worked without a hitch. I strongly recommend that everyone having this problem go over to Bethesda.net and post a support ticket and/or email using the support link at the bottom of the webpage, they seem to be investigating a few other issues so right now is the time to draw attention to this.