The candidate is unable to see some fields when the requisition is closed even if READ/WRITE permissions are granted to C role in that status.
SAP SuccessFactors Recruiting Management
The fields in the application are editable only when the requisition is Open.
When the requisition is closed no application fields can be updated anymore, but what that been updated in the past will be still visible.
This is the system design.
application edit fields requisition closed , KBA , LOD-SF-RCM-APP , Applicants and Job Applications , Problem