Cannot effectively nuxeo-filter in the context of a Collection

How to reproduce

• In a project, create a button MyButton in the slot Results Selection Actions with a dedicated icon and an operation such as Log
• Add a filter of this element such as Type is one the types Folder, Workspace, Collection, Note

• Install nuxeo-10.10 (-HF50) and the project and WebUI
• Create a Folder or a Workspace and in it, 1 document of type Note
• Select a Note -> NOTICE THE icon IS DISPLAYED on the top bar
• Add the Note to a Collection
• Go to the Collection
• Select a Note -> NOTICE THE icon IS NOT DISPLAYED on the top bar

Conclusion; within the context of a Collection, a <nuxeo-filter> element almost always returns false.
(notice that if putting as a unique filter Condition to true, then the element is displayed)

Expected: a <nuxeo-filter> element should work as in the case of other containers, e.g. document.title=="SOME_VALUE" or a filter on document type should work as in other containers