Dropdown buttons for a preset of Record settings do not respond when clicked on header name. Dropdown responds only on clicking on the arrow. Refer the attached video

Steps to reproduce:
1) Create a new project
2) Window > Package Manager > Install Unity Recorder
3) Recorder burger menu > Save Recorder list
4) Click on any header of the dropdown for the RecorderSettingPreset

Actual result: Dropdown buttons do not respond on clicking on the header name

Expected result: Dropdown buttons should respond on clicking on the header name

Occurring in: 2021.2.0a3, 2021.1.0b5, 2021.1.0a1, 2020.2.2f1, 2020.1.13f1, 2019.4.9f1

Environment: Both Windows and Mac