When you are in combat, killing enemies on higher floors sometimes nets you some loot. But if you later on attract a Z600 and it crashes the whole friggin house under you the loot stays on upper levels and just hang in midair. Would be nice that after a level collapses, the loot falls down to base level.
Usually if the loot floats one story above you, you can still collect it. If it’s more than one story it may be a different story. Thank you for bringing this to our attention I will report it to the team.
I’ve had this problem. If you leave the zone and come back floors and walls are back and the loot should still be there.