Just updating to let users know that this behavior is also present in Business 2024 at least for 8453-C. The signed PDF is listed in Attachments. However, the uploaded file is not in the preview and saved copies.
Uploading and transmitting are separate processes. So, the former does not guarantee the latter. Showing the correct file in the preview and saved PDFs provides feedback to the user that the upload worked. Indeed, this is expected behavior for most users.
On a related note, Business 2024 sometimes also displays a successful upload when it did not happen. (E.g., entering an incorrect file path/location.) Hopefully, improvements can be made.
