Each backed up Object has a DataProtection (how long the Media is protected) and a CatalogProtection (how long DataProtector retains the infos which files are in the Backup).
If the catalog Protection is expired the Detail Infos are removed and you would need to read them from Media again.
That could be done in Devices & Media, select the Media and execute Import Catalog from context menu.
Could you share a screenprint of your restore-selection and the Object Protection?