Issue Summary

If a select list Custom field has a backslash in its name, it cannot be used in issue navigator basic search query. When clicked, its dropdown does not appear.

Steps to Reproduce

1. Created a select list custom field with a backslash in its name:
   
2. In the issue navigator, attempt to use the basic issues search with that field. Note that when clicking on it, the field is highlighted but the dropdown doesn't appear:
   

Expected Results

A dropdown should appear when a select list custom field is clicked in the basic query UI.

Actual Results

The field is highlighted with a blue line but no dropdown appears.

No console or network errors.

Workaround

Change the name of the field so that it does not include a backslash or use JQL instead of the basic search.