This bug seams to only happen in duties, when I'm in combat my character (scholar) puts away its weapon immediately after casting spells, the book just disappears and my character puts its hands down like I'm out of combat. The book is still visible at my side, but it should remain in my hands during combat. I've tested this outside of duties but I can not replicate the bug, it only happens in duties. This started happening after patch 2.1.