Attachment is not reflecting on the HR case activity page when user add an attachment after submitting a request from portal

After upgraded instance to Orlando patch 4, When a request is submitted via esc portal and if an attachment is attached to the request. post submission the attachment is deleted from the sys_attachment table.

Orlando Patch 4

The issue is because of custom ACL which is not allowing attachment for hr_case table records.

To resolve the issue:

1. Modifying the custom ACL, for the new requests.
2. Post that, Attachments will be populated for HR cases