Jira Issue Macro doesn't distinguish multiple custom field with same name in "Columns to display"

Summary

When there are multiple custom fields with the same name on a screen, once user select the one side in Jira Issue Macro "Columns to display", can't select the other side.

Steps to Reproduce

1. Create two custom fields with the same name. For example, "Checkboxes".
2. Create a page in Confluence and add the Jira Issue Macro to that page
3. Edit that macro to display some from Jira
4. Open "Display options" and edit "Columns to display"
5. Select one "Checkboxes"
6. Select the other "Checkboxes"

Expected Results

In the "Columns to display", "Checkboxes" custom field should appear twice.

Actual Results

"Columns to display" shows two options but once user select one side, can't select the other side.

Workaround

Use different names for the custom fields on the same screen.