Board Thread:Skyrim/@comment-12182749-20130713234550/@comment-11868563-20130715041818

I have only ever had this issue while or shortly after using a bow, general things that steal the focus from the character, script events and such, while your arrow is drawn will cause this. I fixed it by using a bow while crouched and fire ready, then put your bow away, try other posture changes, sitting, sleeping, that should help