Record the exact path
Note whether the item is absent from the main library but visible when entering a particular collection. Those observations describe two browsing surfaces. Do not reimport the source simply because they differ.
Keep the policy understandable
Document why the item is hidden and which collection is its intended doorway. That prevents another administrator from repeatedly undoing a deliberate design. If the collection should not contain it, change membership for that reason and inspect the result.
No client or access test was performed here. The article explains a documented browsing consequence and offers a focused way to verify the path people actually use.
Questions answered
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.

