Noticed that in Gnarly the "Verify user mapping" results from LDAP show results however, there's no modal title, columns or close button and the results are half off the screen and unscrollable to. You can however close the modal with the escape key as a workaround (though there's no workaround I see to seeing the full results or sorting).
There were a couple LDAP fixes in Gnarly however none I saw/believe specific to this button/modal.
Debug was off during this test. I cleared my browser cache before each attempt to be sure nothing odd was caching.