Test Execution "Tests" column changes not applied in panel (refreshes but keeps same columns)

Description

When attempting to change/configure the "Tests" section column in a Test Execution, nothing changes. The panel refreshes, but the columns remain unchanged.
There's a customer video that confirmed the behavior, but could not reproduce internally.
Customer evidence shows a client-side error in the browser console:

Uncaught TypeError: _.findWhere is not a function.
HAR also contains an error message: “No order configured”.
The customer already ran Integrity Checker and reinstalled Xray issue persists.
Dev reviewed the code and confirmed it should work regardless; due to video evidence + console errors, dev requested escalation as a bug.

Pre-conditions

• Jira Data Center instance with Xray installed and enabled.

• User has permissions to view the page and update column configuration.

• List of tests in a test execution

How to reproduce

1. Add tests to test execution
2. Click the Columns / Configure columns control.
3. Add/remove one or more columns (change the selection/order).
4. Click Apply / Save.
5. Observe the panel refresh and verify the displayed columns.

Actual result/Attachments

• Panel refreshes but column configuration is not applied (columns remain unchanged).

• Browser console shows:
  • Uncaught TypeError: _.findWhere is not a function
  • DEPRECATED ... AJS.params has been deprecated since 9.0.0 (warning shown in video)

• ColumnsNotUpdating (2).harincludes error: “No order configured”

• Screen Recording 2025-12-18 at 14.36.04 (1).mov

Expected result

• Column changes (selection/order) should be applied immediately after Apply/Save and persist after refresh.

• No console error during the operation.

• No “No order configured” error for a normal column configuration update.

Version

• Jira – 10.3.2
• Xray – 8.2.2-j10