Reason not shown when changing retention/embargo of draft file

What steps does it take to reproduce the issue?

1. Add a file to an existing or new dataset.
2. Save the changes
3. Select retention period or embargo from edit files, fill in a reason and save the changes
4. Repeat step 3: the reason is not shown

• When does this issue occur?

While working on a draft dataset.

• Which page(s) does it occurs on?

https://demo.dataverse.org/dataset.xhtml

• What happens?

No content in the reason field in step 4

• To whom does it occur (all users, curators, superusers)?

Curators and dataset owners.

• What did you expect to happen?

Content in the reason field.

Which version of Dataverse are you using?

v. 6.10.1 build iqss-2

Any related open or closed issues to this bug report?

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Are you thinking about creating a pull request for this issue?
Help is always welcome, is this bug something you or your organization plan to fix?

Reproduce the issue on the dataset.xhtml page using the listed steps: add a file, save the draft, set a retention period or embargo with a reason, then reopen the edit form. Trace the draft dataset file-editing flow and verify that the entered reason is shown when the retention or embargo is edited again. Done means the reason field retains and displays its saved content for curators and dataset owners.