Issue with Update Network Group Missing Entities

4774286 (parent: 4737825) | CargoShipContainer | assets/content/props/shipping_containers/harbor_dynamic_container.prefab @ (-4.50, 18.50, -21.00)
4774277 (parent: 4737825) | CargoShipContainer | assets/content/props/shipping_containers/harbor_dynamic_container.prefab @ (10.50, 15.50, -21.00)

UpdateNetworkGroup: Missing parent entity 4737825
UpdateNetworkGroup: Missing parent entity 4737825

I keep getting this spam in my console and it only started happening after I added Harbor Event. I then had to start running this plugin often to fix it: https://github.com/WheteThunger/DebugMissingParentEntity

Hi, according to the reports, the problem is the broken parent of the red containers on CargoShip. Most likely, this happens when Cargo is deleted, and judging by the coordinates of the containers, they move to zero coordinates and are not deleted along with Cargo. That's why the error message appears in the console. 

The plugin that you sent on command finds all such objects and deletes them from the map. It turns out that as long as such objects are on the map, then you see this message in the console, as soon as they are not there, then there are no messages. That's why this plugin helps you.

Now the question is, how do you get this result? In which case of the end of the event does such a problem appear? How is Cargo deleted in order to get the corresponding problem?