Even if I specify the number of scraps, it will be set to 0 once downloaded.
Looty issue?
You need to check, There are 2 spots where scrap can be added to a container.
On is inside the loot container. When you add scap from the list of items on the right.
The other part is adding it from the setup of the container. Top right. ( Scrap amount Min/Max ) If you add scrap there it wall always put scrap in the container.
If you add scrap from the items list it might not always drop in the container.
My experiance.
I only use the setup for the container