The fix is included in ui-components 1.0.7 https://github.com/ManageIQ/manageiq-ui-classic/pull/3279
Verified in 5.9.0.19.20180130154138_e545381. DialogFieldDropDownList works as expected.
*** Bug 1592560 has been marked as a duplicate of this bug. ***
Created attachment 1455985 [details] Video works with chrome Attached is the video of selecting values in dropdown list . Values are selected correctly on one click. Verified in 5.9.3.3.20180627151410_682cecf
Appliance : https://10.8.196.111 service : ansible_playbook