Scale resizer value from Game view is not changing on mouse click

Steps to repro:
1. Create a new project
2. Change the scale of Game View using click on Slider

Actual Result:
Slider value not changing on mouse clicking the slider

Expected Result:
Slider value change on mouse click and value reflects in Game View

Note:
Refer attached video.

Occurring with:
2019.3.0a9, 2019.3.0a8

Working fine on:
2019.3.0a7, 2019.2.0b9

Environment:
Windows 10 and Mac 10.14