[curt.clifton]

OF is pushing you to have contexts for all items. The assumption is that an item without a context hasn't been fully processed. To keep it from slipping through the cracks, OF treats it differently.

You can set a default context for your single action list: click on the list itself and use the inspector to set the context. Then items added to the list will be assigned that default context if they don't already have one set. (If you truly can do the items that don't have a context anywhere, then you could create an "anywhere" context for your default.)