Drop container behaviour

Is it intentional that it's not possible to add items to an existing drop container on the ground?

Some kind of warning would be useful to tell the player that drop containers don't persist between entering and exiting habitats nor between play sessions, so anything stored in them will be lost eventually (unless they should persist and it's actually an issue).

It could aslo be useful if the scanner could detect them as blue sites with the same range limit and behaviour as it does with the "regular" blue sites.