Dynamic Data List form can't be saved in an non default language

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, Master
• Fix Version/s: 7.1.10 DXP FP19, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP6, 7.2.X, 7.3.3 CE GA4, 7.3.10 DXP GA1, Master
• Component/s: Dynamic Data Lists
• Labels:
  • INACTIVE
  • ee-ts
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-19-7110
  • liferay-fixpack-dxp-6-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3

Environment: DXP 7.2 with FP4 and hotfix-1247 installed
Steps to reproduce:

1. Create a dynamic data list definition with translations (use attached source)
2. Create a dynamic data list and select the new data definition
3. Put the dynamic data list portlet to a page and select the new list
4. Set the DDL portlet in form mode (see configuration's screenshot)
5. Add a language switcher portlet to the page
6. Switch the language
7. Reload the page
8. Fill in the DDL form. (An other language then the site default language)

Actual behavior: You can not save the form. In the tomcat log you get an error: DDMFormValuesValidationException$MustSetValidAvailableLocales: Invalid available locales set for field name FIELD_NAME

Expected behavior: You can save the form

This issue is occurs with the customer's latest hotfix (hotfix-1247), provided on LPP-36900, so it is probably caused by a regression.
Thank you for looking into this.