Repeatable field with language values disappears after save when multiple language-tagged fields exist in submission form

[EikLoe]

Describe the bug

If you have the language dropdowns activated for multiple fields in the submission workflow and create more than one value with languages assigned, the frontend won't always render all values correctly. Though I'm not completely sure, if this is actually a problem on the angular side or on the backend.

Steps to reproduce the behavior:

1. Add the <language value-pairs-name="common_iso_languages">true</language> attribute to the dc.title.alternative field in the traditionalpageone step and the dc.description.abstract field in the traditionalpagetwo step.
2. Set the dc.description.abstract field in the traditionalpagetwo step to repeatable: <repeatable>true</repeatable>
3. Start a new submission by using the default workflow
4. Add two values in the Other Titles fields by using the Add more button and choose languages for both values
5. Add two values to the Abstract fields by using the Add more button, too and choose languages for both.
6. Save the submission and watch how the second value of the Other Titles field vanishes.

Expected behavior

All values with assigned languages should stay visible.

[jlipka]

@EikLoe Could you please check the networks requests and their responses? It might be that the response from the backend does not sent all data to the client. In my test-case, i see the following requests:

Only the marked one does contain all entries of the repeatable metadata field. The other two requests to the submission ID are incomplete, see here:

This is just my initial analysis of the main branch of DSpace—maybe someone has an idea of what a solution might look like, or what parts of the code might be causing this. It seems the projection=allLanguages request parameter makes the backend to return all values.

[lgeggleston]

Hi @EikLoe, thanks for submitting this! I'm wondering if this might be related to this issue (part 2, metadata saved in different languages disappearing). Either the same bug observed in submission vs. edit, or related to similar changes perhaps?