Animator Checkbox Icon is distorted when Animation is in Preview State

Steps to Reproduce:

1. Create a new Project
2. Create an empty GameObject
3. Open Window > Animation > Animation
4. Select newly created GameObject and click on Create in Animation Window
5. Click on Preview Button
6. Go to GameObject > Inspector > Animator

Expected Result: Animator checkbox icon should not be distorted

Actual Result: Animator checkbox icon is distorted

Reproducible on: 2020.1.0a5, 2019.3.0b4

Working Fine on: 2019.3.0b3

Environment: Windows 10 and Mac 10.14