Newest game logic change happened yesterday, and source for it is chat between Calvin and Lynton-Wolfe:
Calvin: Oliver… are you there? Sent at 11:15 AM on Tuesday This chat is off the record
Lynton-Wolfe: yes. here
Calvin: had a few reports that objects dropped out of the scanner have been disintegrating/disappearing… Planned?
Lynton-Wolfe: yes. part of a recent upgrade to the systems here. The new version of the scanner is more efficient at manifesting XM based objects but the objects are no longer stable when detached from an operational scanner or portal. Objects dropped out in the world will lose cohesion and disintegrate in approximately 12 hours.
Calvin: So operatives have to use or lose it.
This means that stash tactics don’t work any more, and this will further enforce 2000 items limit. Also this change will remove all dropped items that were swarming some areas, caused by item limit. Players were removing their media and low-level items to make space in their inventory, and made huge quantities of basically a junk in the game…