Answer
This is commonly a stale client-side metadata cache issue rather than a problem with the actual page configuration or its permissions. Try clearing the client metadata cache directly via a specific browser URL against your own server: https://<server>:<port>/main/ifsapplications/web/server/clearmetadatacache?VALUE=<client_model> (substituting your own server/port and the relevant client model value) — this forces a fresh metadata fetch and commonly resolves the discrepancy between what Page Designer shows and what the runtime page renders.