I didn't see this reported yet regarding the new feature of holding down the mouse button to pick up multiple items:
In Iris the additional map of the plague district at Dr. Bekker's house is on a table near two coins, and when picked up along with them a 'blank' decal appears in the inventory for it, but the map isn't there if you open it and is gone from the table. Had to reload and pick it up separately then all was good. This was on the latest 2.11-beta 3 but it also happened on the previous one. Am not sure if something in the FM itself is related but I suspect it could just be from the new feature.
I made a playthrough with all loot on Expert, may help track it down:
