This happened earlier yesterday. I was attacking a fire sentinel in the Orbis Tower, and so I killed it. The items that it dropped didn’t fly up and then down. It literally bounced against the wall that was behind it and flew downwards past the ledge it was on. I found the items on the ledge below it. It was really weird. -_- Also another time, a monster dropped items and it was like floating in a area underneath me where I couldn’t reach it. Funny how these little glitches in games work..