I placed a ship at the station for a teleport endpoint so I could manage OOS in a reasonably calm sector.
Although I was not watching the local sector map, I guess that the cargo was plundered from the station by the pirate. Originally there was 2 containers.
Anyhow, I eventually figured that I would send the ship to go pickup some of the loot, which failed as the ship cannot get a target on the loot.
I then got in the ship and went to check it out. Thinking maybe it was in structure or something odd. Nothing unusual and I was able to fly into the cargo and fill my hold. The remaining portion eventually decayed as expected. The other drop as shown has been there for a week or so now.
Anyhow, certainly isn't supposed to be there forever AFAIK so somehow the drops became bugged. In case this save is useful, great.
I may have a save before the drops but repo could be lacking. Maybe this save can only useful to tweak garbage cleanup.
quicksave-persistent-cargo-drop.xml.gz (6 day lifetime or 1st download)