Hi So it looks like that, I have killed anego, received maybe 20k exp and it didnt drop anything, then after a day went on bf, killed one gained 5% no drops, killed another one and it gave me 3797exp but also no drops.
I didnt take any quest since ages,imo impossible, just done few bfs and it works fine. but it was 2nd time in a day, so screened and reported, if it will happen again i'll try to describe it more precisly.