On changing mip-maps slider value on sprite editor window, sprite doesn't get's blurred

Steps to Repro:
1. Project window > add 2D sprite
2. Inspector > texture type > Sprite (2D and UI)
3. Advanced > check generate mipmaps property > apply
4. Sprite editor > change mip-map slider value > observe that image doesn't get blurred

Expected Result:
On changing mip-map values sprite should become blur

Environment:
Only occurring on Mac

Occurring with:
2018.1.0b1

Working with:
2018.1.0a7, 2018.1.0a1, 2017.3.0f3