Sometimes, item labels on the ground are completely on top of each other and you can see, say, a yellow item underneath a blue one etc. Exactly on top of each other, not just close or next to each other. Def not seen it pre 0.7.9
Can’t upload screenshot, but seen it regularly enough through many monolith runs to make a post about it.
Happens randomly, throughout the mono run, not just when large quantity of loot drops at end or chest.