My custom field gets removed and set to none on updating the issue via edit issue screen.

[Yogesh Kantiwal]

I am encountering a strange issue, i have built a custom field named (Custom ID) using customfield module for java,  the field is read only and only the Java app can edit or update this.
So if i generate a value from the app and then go to issue view screen, if on the issue view screen if i update any field lets say Priority to High it works as expected. But as soon as i do the same thing via clicking on the edit button to update the Priority and save the changes it removed the Custom ID  field and set it to none.
May anyone please assist me in this.

[G subramanyam]

Hi @Yogesh Kantiwal welcome to Atlassian community.

You're encountering a very specific and indeed strange issue with your "Custom ID" field!

Most likely causes & how to investigate:

Jira Field Configuration and Screen Schemes >> please check the Field Configuration Scheme >> official links to refer: Configure a custom field  and Associate fields with screens in Jira Cloud

Jira Automation Rules (Highly Suspect, given your screenshots):

Review all Automation Rules triggered by "Issue Updated" events in the project.

Pay close attention to any actions that>> "Edit Issue" or "Set Field Value" ; "Smart Values" or Branching Logic or Third-party actions: Actions related to "Rovo Agent" >> Atlassian links for your reference:  Jira automation triggers and Edit and share work items

If you continue to struggle after checking these points, especially with a custom plugin, it would be beneficial to reach out to Atlassian Developer Support.

[Yogesh Kantiwal]

Thank You @G subramanyam  I will refer to these points and try to investigate. Thank you for providing assistance.