Move to organization is sometimes missing

In Bitwarden, I click the badge/shield icon and search for an item and select it.
Sometimes the “Move to organization” choice shows up and sometimes it does not.

The work around is to select edit, and then Collections appears and I can click on that and see a list of collections in the organization and select a collection (or deselect a collection) to move an item to a specific collection.

My question is why is the choice Move to organization sometimes missing when viewing an item?