I was playing and was randomly Disconnected, when i logged back in i had not only been sent back to the start of the dungeon level (which is what normally happens) i had lost 10 or so minutes of experience/gold and most importantly several very nice item drops which was a first.

What caused the items not to save? i haven't seen that happen before, and while its not a huge deal since i'm only in normal i'd like for it not to happen again.